feat: add cachet crates with multi-level caching abstractions

[schgoo]

Cachet (pronounced: ka-SHAY)
Meaning: Prestige, distinction, or high status that makes something admired or desirable.
Examples:
“The brand has a certain cachet in tech circles.”
“Winning that award gave the company international cachet.”
It’s about reputation and perceived quality.
Origin: French, meaning “seal” or “stamp of approval.”

[github-actions]

⚠️ Breaking Changes Detected

error: failed to retrieve local crate data from git revision

Caused by:
    0: failed to retrieve manifest file from git revision source
    1: possibly due to errors: [
         failed to parse /home/runner/work/oxidizer/oxidizer/target/semver-checks/git-origin_main/5ecc21eda91235a1440b4bb664492f2427c3db4e/Cargo.toml: no `package` table,
         failed when reading /home/runner/work/oxidizer/oxidizer/target/semver-checks/git-origin_main/5ecc21eda91235a1440b4bb664492f2427c3db4e/scripts/crate-template/Cargo.toml: TOML parse error at line 9, column 26
         |
       9 | keywords = ["oxidizer", {{CRATE_KEYWORDS}}]
         |                          ^
       missing key for inline table element, expected key
       : TOML parse error at line 9, column 26
         |
       9 | keywords = ["oxidizer", {{CRATE_KEYWORDS}}]
         |                          ^
       missing key for inline table element, expected key
       ,
       ]
    2: package `cachet` not found in /home/runner/work/oxidizer/oxidizer/target/semver-checks/git-origin_main/5ecc21eda91235a1440b4bb664492f2427c3db4e

Stack backtrace:
   0: anyhow::error::<impl anyhow::Error>::msg
   1: cargo_semver_checks::rustdoc_gen::RustdocFromProjectRoot::get_crate_source
   2: cargo_semver_checks::rustdoc_gen::StatefulRustdocGenerator<cargo_semver_checks::rustdoc_gen::CoupledState>::prepare_generator
   3: cargo_semver_checks::Check::check_release::{{closure}}
   4: cargo_semver_checks::Check::check_release
   5: cargo_semver_checks::exit_on_error
   6: cargo_semver_checks::main
   7: std::sys::backtrace::__rust_begin_short_backtrace
   8: main
   9: <unknown>
  10: __libc_start_main
  11: _start

If the breaking changes are intentional then everything is fine - this message is merely informative.

Remember to apply a version number bump with the correct severity when publishing a version with breaking changes (1.x.x -> 2.x.x or 0.1.x -> 0.2.x).

[Copilot]

Pull request overview

Copilot reviewed 80 out of 81 changed files in this pull request and generated 9 comments.

Comments suppressed due to low confidence (1)

Cargo.toml:63

• This change downgrades the workspace jiff dependency from 0.2.21 to 0.2.16. That’s a potentially risky, unrelated version regression (and can reintroduce fixed bugs). If the downgrade is intentional, it should be called out explicitly; otherwise, please restore the prior version while keeping the reordering changes.

criterion = { version = "0.8.1", default-features = false }
dashmap = { version = "6.1", default-features = false }
derive_more = { version = "2.0.1", default-features = false }
duct = { version = "1.1.1", default-features = false }
dynosaur = { version = "0.3.0", default-features = false }

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[Copilot]

Pull request overview

Copilot reviewed 76 out of 77 changed files in this pull request and generated 9 comments.

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[Copilot]

Pull request overview

Copilot reviewed 76 out of 77 changed files in this pull request and generated 5 comments.

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[Copilot]

This comment references an attribute_names_match_tracing_fields test, but no such test exists in the crate. Either add the referenced test (to guard the tracing field names vs attributes.rs) or remove/adjust the comment to avoid pointing readers to a non-existent check.

[Copilot]

Pull request overview

Copilot reviewed 81 out of 82 changed files in this pull request and generated 4 comments.

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[Copilot]

Pull request overview

Copilot reviewed 81 out of 82 changed files in this pull request and generated 6 comments.

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