Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.9.0 to 1.10.0.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](stretchr/testify@v1.9.0...v1.10.0)

---
updated-dependencies:
- dependency-name: github.com/stretchr/testify
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.10.0 to 1.11.1.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](stretchr/testify@v1.10.0...v1.11.1)

---
updated-dependencies:
- dependency-name: github.com/stretchr/testify
  dependency-version: 1.11.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* Add graceful fallback for missing baseline coverage

When the baseline coverage artifact is unavailable (e.g., expired after
90 days or no successful runs on target branch), the action now:

- Continues instead of failing
- Shows current coverage using an empty baseline
- Adds a warning note to the PR comment explaining baseline is unavailable

This prevents CI failures on PRs when baseline artifacts expire.

…#59)

* Add structured outputs to the GitHub Action

Adds six new outputs (total_coverage, coverage_delta, coverage_trend,
total_statements, covered_statements, missed_statements) so downstream
steps can enforce thresholds or create badges without parsing Markdown.

The go-coverage-report binary gains a -metrics-file flag that writes
key=value pairs in GITHUB_OUTPUT format; the shell script passes this
flag and appends the result to $GITHUB_OUTPUT. Closes #64.

* Upgrade linting configuration to golangci-lint v2

Migrates .golangci.yml to the v2 schema and expands the enabled linter
set (gocritic, godot, gosec, nestif, revive, staticcheck, wastedassign).

* Update CHANGELOG for #64

* Update Go to 1.26 and golangci-lint to v2.11.3 in CI

* Pin GitHub Actions to exact commit SHAs to prevent supply chain attacks