The host implementation needs to know the progress of the current
instance for certificate storage and catch up purposes. As a result the
current instance must be safe to read from multiple goroutines. This was
achieved by a dedicated mutex that synchronised all access to the
current instanceID.

Separately, validation logic requires to know how far the current
instance has progressed in order to effectively validate incoming
messages.

The changes here simplify the locking by unifying the logic for checking
the progress of an instance: both validator and host can now get the
latest progress from the participant that is safe for concurrent use.
This is achieved by moving the progress observer mechanism out of
validator and into the participant, while introducing the concept of
`gpbft.Progress` a function that returns the current instance, round and
phase.

As part of this change, Lotus integration can now get the current round
and phase as well as current instance, which is useful for self
equivocation checking as well as debugging purposes.

Fixes #658
Relates to #599

The host implementation needs to know the progress of the current
instance for certificate storage and catch up purposes. As a result the
current instance must be safe to read from multiple goroutines. This was
achieved by a dedicated mutex that synchronised all access to the
current instanceID.

Separately, validation logic requires to know how far the current
instance has progressed in order to effectively validate incoming
messages.

The changes here simplify the locking by unifying the logic for checking
the progress of an instance: both validator and host can now get the
latest progress from the participant that is safe for concurrent use.
This is achieved by moving the progress observer mechanism out of
validator and into the participant, while introducing the concept of
`gpbft.Progress` a function that returns the current instance, round and
phase.

As part of this change, Lotus integration can now get the current round
and phase as well as current instance, which is useful for self
equivocation checking as well as debugging purposes.

Fixes #658
Relates to #599

The root F3 instance holds reference to the `gpbftRunner`, not
`gpbftHost`. To allow access to current progress from Lotus, move the
`Progress` implementation to runner and expose at root `F3` type.

Part of #599

Implemented enhanced token-based participation system for F3 consensus
in `F3Participate`. This update introduces a new design where
participation tokens grant a temporary lease, allowing storage providers
to sign as part of the F3 consensus mechanism. This design ensures that
tokens are checked for validity and issuer alignment, handling errors
robustly. If there's an issuer mismatch, the system advises miners to
retry with the existing token. If the token is invalid or expired,
miners are directed to obtain a new token via `F3GetParticipationToken`.

Fixes filecoin-project/go-f3#599

Implemented enhanced token-based participation system for F3 consensus
in `F3Participate`. This update introduces a new design where
participation tokens grant a temporary lease, allowing storage providers
to sign as part of the F3 consensus mechanism. This design ensures that
tokens are checked for validity and issuer alignment, handling errors
robustly. If there's an issuer mismatch, the system advises miners to
retry with the existing token. If the token is invalid or expired,
miners are directed to obtain a new token via `F3GetParticipationToken`.

Fixes filecoin-project/go-f3#599

Implemented enhanced token-based participation system for F3 consensus
in `F3Participate`. This update introduces a new design where
participation tokens grant a temporary lease, allowing storage providers
to sign as part of the F3 consensus mechanism. This design ensures that
tokens are checked for validity and issuer alignment, handling errors
robustly. If there's an issuer mismatch, the system advises miners to
retry with the existing token. If the token is invalid or expired,
miners are directed to obtain a new token via `F3GetParticipationToken`.

Fixes filecoin-project/go-f3#599

Implemented enhanced token-based participation system for F3 consensus
in `F3Participate`. This update introduces a new design where
participation tokens grant a temporary lease, allowing storage providers
to sign as part of the F3 consensus mechanism. This design ensures that
tokens are checked for validity and issuer alignment, handling errors
robustly. If there's an issuer mismatch, the system advises miners to
retry with the existing token. If the token is invalid or expired,
miners are directed to obtain a new token via `F3GetParticipationToken`.

Fixes filecoin-project/go-f3#599

Implemented enhanced token-based participation system for F3 consensus
in `F3Participate`. This update introduces a new design where
participation tokens grant a temporary lease, allowing storage providers
to sign as part of the F3 consensus mechanism. This design ensures that
tokens are checked for validity and issuer alignment, handling errors
robustly. If there's an issuer mismatch, the system advises miners to
retry with the existing token. If the token is invalid or expired,
miners are directed to obtain a new token via `F3GetParticipationToken`.

Fixes filecoin-project/go-f3#599

Implemented enhanced token-based participation system for F3 consensus
in `F3Participate`. This update introduces a new design where
participation tokens grant a temporary lease, allowing storage providers
to sign as part of the F3 consensus mechanism. This design ensures that
tokens are checked for validity and issuer alignment, handling errors
robustly. If there's an issuer mismatch, the system advises miners to
retry with the existing token. If the token is invalid or expired,
miners are directed to obtain a new token via `F3GetParticipationToken`.

Fixes filecoin-project/go-f3#599

Implemented enhanced token-based participation system for F3 consensus
in `F3Participate`. This update introduces a new design where
participation tokens grant a temporary lease, allowing storage providers
to sign as part of the F3 consensus mechanism. This design ensures that
tokens are checked for validity and issuer alignment, handling errors
robustly. If there's an issuer mismatch, the system advises miners to
retry with the existing token. If the token is invalid or expired,
miners are directed to obtain a new token via `F3GetParticipationToken`.

Fixes filecoin-project/go-f3#599

Implemented enhanced token-based participation system for F3 consensus
in `F3Participate`. This update introduces a new design where
participation tokens grant a temporary lease, allowing storage providers
to sign as part of the F3 consensus mechanism. This design ensures that
tokens are checked for validity and issuer alignment, handling errors
robustly. If there's an issuer mismatch, the system advises miners to
retry with the existing token. If the token is invalid or expired,
miners are directed to obtain a new token via `F3GetParticipationToken`.

Fixes filecoin-project/go-f3#599

Implemented enhanced token-based participation system for F3 consensus
in `F3Participate`. This update introduces a new design where
participation tokens grant a temporary lease, allowing storage providers
to sign as part of the F3 consensus mechanism. This design ensures that
tokens are checked for validity and issuer alignment, handling errors
robustly. If there's an issuer mismatch, the system advises miners to
retry with the existing token. If the token is invalid or expired,
miners are directed to obtain a new token via `F3GetParticipationToken`.

Fixes filecoin-project/go-f3#599

The root F3 instance holds reference to the `gpbftRunner`, not
`gpbftHost`. To allow access to current progress from Lotus, move the
`Progress` implementation to runner and expose at root `F3` type.

Part of #599

The root F3 instance holds reference to the `gpbftRunner`, not
`gpbftHost`. To allow access to current progress from Lotus, move the
`Progress` implementation to runner and expose at root `F3` type.

Part of #599

Implemented enhanced token-based participation system for F3 consensus
in `F3Participate`. This update introduces a new design where
participation tokens grant a temporary lease, allowing storage providers
to sign as part of the F3 consensus mechanism. This design ensures that
tokens are checked for validity and issuer alignment, handling errors
robustly. If there's an issuer mismatch, the system advises miners to
retry with the existing token. If the token is invalid or expired,
miners are directed to obtain a new token via `F3GetParticipationToken`.

Fixes filecoin-project/go-f3#599

The root F3 instance holds reference to the `gpbftRunner`, not
`gpbftHost`. To allow access to current progress from Lotus, move the
`Progress` implementation to runner and expose at root `F3` type.

Part of #599

Implemented enhanced ticket-based participation system for F3 consensus
in `F3Participate`. This update introduces a new design where
participation tickets grant a temporary lease, allowing storage
providers to sign as part of the F3 consensus mechanism. This design ensures that
tickets are checked for validity and issuer alignment, handling errors
robustly. If there's an issuer mismatch, the system advises miners to
retry with the existing ticket. If the ticket is invalid or expired,
miners are directed to obtain a new ticket via
`F3GetOrRenewParticipationTicket`.

Fixes filecoin-project/go-f3#599

Implemented enhanced ticket-based participation system for F3 consensus
in `F3Participate`. This update introduces a new design where
participation tickets grant a temporary lease, allowing storage
providers to sign as part of the F3 consensus mechanism. This design ensures that
tickets are checked for validity and issuer alignment, handling errors
robustly. If there's an issuer mismatch, the system advises miners to
retry with the existing ticket. If the ticket is invalid or expired,
miners are directed to obtain a new ticket via
`F3GetOrRenewParticipationTicket`.

Fixes filecoin-project/go-f3#599

Implemented enhanced ticket-based participation system for F3 consensus
in `F3Participate`. This update introduces a new design where
participation tickets grant a temporary lease, allowing storage
providers to sign as part of the F3 consensus mechanism. This design ensures that
tickets are checked for validity and issuer alignment, handling errors
robustly. If there's an issuer mismatch, the system advises miners to
retry with the existing ticket. If the ticket is invalid or expired,
miners are directed to obtain a new ticket via
`F3GetOrRenewParticipationTicket`.

Fixes filecoin-project/go-f3#599

Implemented enhanced ticket-based participation system for F3 consensus
in `F3Participate`. This update introduces a new design where
participation tickets grant a temporary lease, allowing storage
providers to sign as part of the F3 consensus mechanism. This design ensures that
tickets are checked for validity and issuer alignment, handling errors
robustly. If there's an issuer mismatch, the system advises miners to
retry with the existing ticket. If the ticket is invalid or expired,
miners are directed to obtain a new ticket via
`F3GetOrRenewParticipationTicket`.

Fixes filecoin-project/go-f3#599