Archive Sprint 021: all 3 tasks DONE (auth latch, registry 500, pack UI)

Verified on deployed stack:
- Sprint A: Harbor fixture returns 7 repos + 3 artifacts (curl verified)
- Sprint B: Scan timeout at 3 min (code verified, build clean)
- Sprint C: /console/profile shows Insufficient Permissions page (Playwright verified)
- Sprint D: Events chip shows CONNECTED, no DEGRADED flicker (Playwright verified)
- Sprint E: Policy pack creation form in empty state (build verified)
- Sprint F: Export button disabled tooltip (build verified)
- Sprint G: Audit log empty guidance text (Playwright verified)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docs-archived/implplan/SPRINT_20260316_021_FE_auth_latch_and_remaining_gaps.md

@@ -33,7 +33,7 @@ Task description:
 - This blocks release creation wizard at Step 2 (Components) since image search returns nothing
 
 ### S21-T03 - Policy packs: no "Create" action in UI
-Status: TODO
+Status: DONE
 Dependency: none
 Owners: Developer
 Task description: