docs: add images depicting the architecture · postfinance/propeller@d5645d3

The following actions uses node12 which is deprecated and will be forced to run on node16: actions-rs/toolchain@v1, actions-rs/cargo@v1. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

The following actions uses Node.js version which is deprecated and will be forced to run on node20: actions-rs/toolchain@v1, actions-rs/cargo@v1. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

version requirement `0.9.34+deprecated` for dependency `serde_yaml` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion

src/config.rs#L39

unused import: `super::*`

src/vault.rs#L13

constants have by default a `'static` lifetime

src/vault.rs#L103

unused import: `super::*`

src/vault.rs#L105

unused import: `vaultrs::client::Client`

src/workflow.rs#L1

unused import: `std::fmt::format`

src/workflow.rs#L4

unused import: `vaultrs::auth::userpass::user::update_password`

src/workflow.rs#L95

unused import: `postgres::Client`

src/workflow.rs#L148

variable does not need to be mutable

src/workflow.rs#L160

variable does not need to be mutable

version requirement `0.9.34+deprecated` for dependency `serde_yaml` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion

tests/rotate.rs#L187

variable does not need to be mutable

src/config.rs#L39

unused import: `super::*`

src/vault.rs#L103

unused import: `super::*`

src/vault.rs#L105

unused import: `vaultrs::client::Client`

src/workflow.rs#L1

unused import: `std::fmt::format`

src/workflow.rs#L4

unused import: `vaultrs::auth::userpass::user::update_password`

src/workflow.rs#L95

unused import: `postgres::Client`

src/workflow.rs#L148

variable does not need to be mutable

src/workflow.rs#L160

variable does not need to be mutable

version requirement `0.9.34+deprecated` for dependency `serde_yaml` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion

src/config.rs#L39

unused import: `super::*`

src/vault.rs#L103

unused import: `super::*`

src/vault.rs#L105

unused import: `vaultrs::client::Client`

src/workflow.rs#L1

unused import: `std::fmt::format`

src/workflow.rs#L4

unused import: `vaultrs::auth::userpass::user::update_password`

src/workflow.rs#L95

unused import: `postgres::Client`