feat(core): support 256 authorities

[polinikita]

Summary

• Adds end-to-end support for committees up to 256 authorities by widening AuthoritySet-based paths used by strong-vote masks, useful-author bitmasks, quorum signer tracking, and DAG known-by metadata
• Fixes 256-edge wraparounds caused by usize -> u8 upper-bound casts in committee iteration and own-block recipient indexing
• Makes high authority ids safe in formatting/output paths and adds boundary coverage for authority iteration, peer-255 own-block delivery, and high-index formatting
• Updates dryrun to support the wider validator range in practice: full IPv4 incrementing across octet boundaries, automatic /23 subnet selection, derived infra/container IPs, dedicated compose project naming, and stale Docker endpoint cleanup before relaunch

Test plan

• cargo +nightly fmt --all --check
• cargo sort -w -c
• cargo clippy --all-features --no-deps -- -D warnings
• cargo clippy --all-features --tests --no-deps -- -D warnings
• cargo doc --no-deps --workspace
• cargo build --verbose
• cargo test --workspace -- --skip smoke_tests
• cargo test -p starfish-core -- validator::smoke_tests --test-threads=1
• Retry of validator::smoke_tests::validator_lifecycle_and_recovery::_cordial_miners_540_expects to match CI retry behavior
• TEST_TIME=20 bash scripts/dryrun.sh

[github-actions]

Package	Line Rate	Health
crates/starfish-core/src	32%	❌
crates/orchestrator/src	16%	❌
crates/orchestrator/src/client	7%	❌
crates/starfish/src	3%	❌
crates/starfish-core/src/consensus	18%	❌
crates/starfish-core/src/core_thread	0%	❌
crates/starfish-core/src/runtime	0%	❌
crates/orchestrator/src/protocol	1%	❌
Summary	28% (3275 / 11855)	❌