feat: add support for GitHub Actions scans in Supported Projects

[igor-soldev]

This PR introduces support for ingesting InfraScan results directly from GitHub Actions artifacts, extending existing scan sources (manual, monitored, etc.).

Key changes

• Added new config and storage for GitHub Actions projects
• Implemented GitHub Actions integration:
  • Fetch latest successful workflow runs via GitHub API
  • Download and parse scan artifacts (JSON / HTML fallback)
  • Support for embedded CLI data in HTML reports
• Added deduplication of already processed runs (run_id)
• New endpoint:
  • POST /api/scans/github-actions/refresh to refresh scans from CI

Supported Projects improvements

• Project key now based on full normalized repository URL (better fork handling)
• Display format updated to owner / repo
• Enhanced source tracking for scans (GitHub Actions, Web App, CLI, etc.)

UI updates

• Added Owner and Repository columns
• Improved search (now includes repo URL)
• New scan source badges with clearer CI vs manual distinction

Impact

• Enables fully automated CI-based scanning via GitHub Actions
• Improves project deduplication and identification
• Unifies scan results across multiple ingestion sources