Open Code Review 1.6.5 አውርድ

🚀 Features
- feat(ci): add Sigstore attestation for release artifacts
🐛 Bug Fixes
- fix: skip permission-based tests when running as root in CI
- fix: stabilize TestDiscoverRepos_FindsRepos with explicit mtime ordering
📖 Documentation
- docs: update OpenSSF badge to Silver level
- docs: add security assurance case and use signed tags
Other Changes
- chore(deps): bump the go-dependencies group with 12 updates (#232)
- ci: add 80% statement coverage threshold check
- Feature/rule link to files (#226)
- test: improve coverage for tool package from 79.5% to 93.6%
- test: improve coverage for telemetry package and exclude extensions from build targets
- test: improve coverage for cmd/opencodereview package from 42% to 70%
- test: improve coverage for viewer package from 35% to 92%
- test: improve coverage for template and pathutil packages
- test: add coverage tests for agent, llm, llmloop, and scan packages
- test: add unit tests for output_helpers, config, model, stdout, and telemetry packages
- chore: remove unused cmd/testdiff debug helper
- test: expand unit test coverage for agent, llm, llmloop, and tool packages
- test: add unit tests for pure logic functions across 6 packages
Full Changelog: https://github.com/alibaba/open-code-review/compare/v1.6.4...v1.6.5