fix: validate renovate dependency rule coverage

[zeitlinger]

Summary

• extend renovate-deps snapshots to record extracted dependency metadata alongside file-to-dependency mappings
• validate Renovate package-rule coverage for dependencies that resolve to the same upstream package but use different extracted dep names
• align the repo Renovate config and tests with matchDepNames, and make the README quickstart regex managers use canonical dep names
• add fixture coverage for the #260-style mismatch where mise.toml and README.md extract different dep names for the same package

Why

#260 showed that the README quickstart regex manager could update actionlint independently from mise.toml. The root cause was that Renovate extracted rhysd/actionlint from README.md while the linter group matched actionlint by dep name, so grouped updates could silently diverge until the separate README drift test failed.

This change makes renovate-deps catch that configuration mistake directly by comparing rule matching against the extracted dependency identities that Renovate actually emits in extract mode.

Validation

• cargo test
• mise run lint:fix
• mise run lint

[Copilot]

Pull request overview

This PR extends the renovate-deps check so Flint records dependency metadata in tracked snapshots and validates that Renovate package rules cover aliases of the same upstream package consistently. It also updates the repo’s Renovate config, docs, and fixtures to use canonical dep names so grouped updates stay aligned across mise.toml, README regex managers, and snapshot validation.

Changes:

• Add metadata-aware snapshot parsing/writing and rule-coverage validation for renovate-deps.
• Refactor/expand renovate_deps implementation and test coverage, including a new inconsistent-rule-coverage fixture.
• Update Renovate preset/config/docs/snapshots to use matchDepNames and canonical README dep names.

Reviewed changes

Copilot reviewed 28 out of 28 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
tests/cases/renovate-deps/up-to-date/files/.github/renovate-tracked-deps.json	Updates fixture snapshot to new {meta, files} shape.
tests/cases/renovate-deps/up-to-date-renovaterc-json/files/renovate-tracked-deps.json	Updates root-config fixture snapshot format.
tests/cases/renovate-deps/out-of-date/test.toml	Adjusts out-of-date expectations for new snapshot/diff output.
tests/cases/renovate-deps/out-of-date/files/.github/renovate-tracked-deps.json	Updates stale snapshot fixture to wrapped format.
tests/cases/renovate-deps/inconsistent-rule-coverage/test.toml	Adds end-to-end fixture for split dep-name rule mismatch.
tests/cases/renovate-deps/inconsistent-rule-coverage/files/mise.toml	Provides fixture tool file for mismatch case.
tests/cases/renovate-deps/inconsistent-rule-coverage/files/README.md	Provides fixture README for mismatch case.
tests/cases/renovate-deps/inconsistent-rule-coverage/files/.github/renovate.json5	Adds fixture Renovate rule using matchDepNames.
tests/cases/renovate-deps/inconsistent-rule-coverage/files/.github/renovate-tracked-deps.json	Adds fixture snapshot metadata for alias comparison.
tests/cases/renovate-deps/fix-update/test.toml	Updates fix-mode snapshot expectation to new format.
tests/cases/renovate-deps/fix-update/files/.github/renovate-tracked-deps.json	Updates stale fix fixture snapshot wrapper.
tests/cases/renovate-deps/fix-create/test.toml	Updates create-mode expected snapshot output.
tests/cases/renovate-deps/fast-only-relevant/files/.github/renovate-tracked-deps.json	Updates adaptive fast-only relevant fixture snapshot.
tests/cases/renovate-deps/fast-only-irrelevant/files/.github/renovate-tracked-deps.json	Updates adaptive fast-only irrelevant fixture snapshot/meta.
tests/cases/general/fast-only-explicit-override/files/.github/renovate-tracked-deps.json	Updates general fast-only override fixture snapshot.
src/registry/tests.rs	Updates Renovate preset/docs generation assertions for dep-name matching.
src/registry/checks.rs	Expands renovate-deps registry docs to cover rule-coverage validation and canonical dep names.
src/linters/renovate_deps/tests.rs	Adds focused tests for snapshot parsing, relevance, and rule-coverage behavior.
src/linters/renovate_deps/snapshot.rs	Adds snapshot/meta parsing, legacy compatibility, writing, and diff helpers.
src/linters/renovate_deps/rules.rs	Adds comparable rule parsing, alias grouping, and rule-coverage validation logic.
src/linters/renovate_deps/mod.rs	Adds modularized renovate-deps implementation with metadata refresh support.
src/linters/renovate_deps.rs	Updates existing monolithic implementation with the same snapshot/rule-coverage changes.
src/config.rs	Adds refresh_meta config for renovate-deps.
docs/linters/renovate-deps.md	Adds dedicated guide for snapshot metadata and rule-coverage failures.
docs/linters.md	Regenerates renovate-deps docs with new guidance.
default.json	Switches weekly linter grouping rule to matchDepNames.
.github/renovate.json5	Aligns repo Renovate config and README regex managers with canonical dep names.
.github/renovate-tracked-deps.json	Refreshes committed repo snapshot to include metadata and canonical README deps.

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