Add contributor-focused GitHub workflows

[advaitpatel]

Summary

• Add PR auto-labeler (pr-labeler.yml + .github/pr-labeler.yml) to tag PRs by
  changed path (cli, core, reports, config, ci, docker, documentation, dependencies, tests)
• Add stale bot to close inactive issues/PRs after 60/14 days, exempting
  pinned/security/good-first-issue
• Add first-interaction welcome message for new issue/PR authors
• Add standalone ruff lint job for fast style feedback on PRs
• Add dependency review to flag vulnerable/incompatible deps on PRs
• Add Dependabot auto-merge for patch/minor version bumps once checks pass

Notes

• New labels created in the repo: cli, core, reports, config, ci, docker, tests, stale
• Lint workflow only runs ruff (already clean); black/isort were left out since the
  existing codebase isn't formatted to those standards yet and would fail as a new
  required check

[github-actions]

Dependency Review

The following issues were found:

• ✅ 0 vulnerable package(s)
• ✅ 0 package(s) with incompatible licenses
• ✅ 0 package(s) with invalid SPDX license definitions
• ⚠️ 1 package(s) with unknown licenses.

See the Details below.

License Issues

.github/workflows/welcome.yml

Package	Version	License	Issue Type
actions/first-interaction	1d02526d949a90f18ba22cd8c1e7cddd97ba6ee8	Null	Unknown License

OpenSSF Scorecard

Package	Version	Score	Details
actions/actions/stale	5bef64f19d7facfb25b37b414482c7164d639639	🟢 4.9	Details Check Score Reason Maintained ⚠️ 0 1 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0 Packaging ⚠️ -1 packaging workflow not detected Code-Review 🟢 10 all changesets reviewed Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Binary-Artifacts 🟢 10 no binaries found in the repo Token-Permissions ⚠️ 0 detected GitHub workflow tokens with excessive permissions CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Pinned-Dependencies ⚠️ 0 dependency not pinned by hash detected -- score normalized to 0 License 🟢 10 license file detected Fuzzing ⚠️ 0 project is not fuzzed Signed-Releases ⚠️ -1 no releases found Security-Policy 🟢 9 security policy file detected Branch-Protection ⚠️ 1 branch protection is not maximal on development and all release branches SAST 🟢 5 SAST tool is not run on all commits -- score normalized to 5
actions/actions/first-interaction	1d02526d949a90f18ba22cd8c1e7cddd97ba6ee8	🟢 4.6	Details Check Score Reason Maintained ⚠️ 0 0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0 Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Packaging ⚠️ -1 packaging workflow not detected Code-Review 🟢 3 Found 1/3 approved changesets -- score normalized to 3 Binary-Artifacts 🟢 10 no binaries found in the repo CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Token-Permissions ⚠️ 0 detected GitHub workflow tokens with excessive permissions Pinned-Dependencies 🟢 3 dependency not pinned by hash detected -- score normalized to 3 License 🟢 10 license file detected Fuzzing ⚠️ 0 project is not fuzzed Signed-Releases ⚠️ -1 no releases found Security-Policy 🟢 9 security policy file detected Branch-Protection ⚠️ 1 branch protection is not maximal on development and all release branches SAST 🟢 9 SAST tool detected but not run on all commits

Scanned Files

• .github/workflows/stale.yml
• .github/workflows/welcome.yml