docs: update roadmap to reflect Phase 3 completion

Dan Notesteinrequested to merge
docs/update-phase3-status into develop

Summary

  • Mark Phase 3 (Reusable YAML Blocks) as completed in roadmap
  • Add table of completed templates with locations and descriptions
  • Update timeline status from "Planning" to "Completed"

Templates documented as completed:

  • .fetch_cache_manager - Fetch cache-manager.sh script
  • .haf_app_wait_for_postgres - Wait for PostgreSQL (DinD compatible)
  • .haf_app_wait_for_postgrest - Wait for PostgREST with DNS fix (MR !146 (merged))
  • .cleanup_stale_cache - Clean stale cache with permission issues (MR !146 (merged))
  • .cleanup_cache_manual_template - Manual cache cleanup job
  • .cleanup_old_cache_template - Age-based cache cleanup

Test plan

  • Documentation-only change, no code impact

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