docs(09-03): complete Gitea Actions CI pipeline plan

- 09-03-SUMMARY.md: CI pipeline with 2-job fail-fast backend+portal
- STATE.md: advanced to 09-03 complete, added CI decisions
- ROADMAP.md: Phase 9 marked 3/3 plans complete
- REQUIREMENTS.md: QA-07 marked complete

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.planning/STATE.md

@@ -3,8 +3,8 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: completed
-stopped_at: Completed 09-02-PLAN.md (visual regression, a11y, Lighthouse CI)
-last_updated: "2026-03-26T04:53:31.934Z"
+stopped_at: Completed 09-03-PLAN.md (Gitea Actions CI pipeline)
+last_updated: "2026-03-26T04:53:34.692Z"
 last_activity: 2026-03-23 — Completed 03-02 onboarding wizard, Slack OAuth, BYO API keys
 progress:
   total_phases: 9
@@ -223,6 +223,6 @@ None — all phases complete.
 
 ## Session Continuity
 
-Last session: 2026-03-26T04:53:23.031Z
-Stopped at: Completed 09-02-PLAN.md (visual regression, a11y, Lighthouse CI)
+Last session: 2026-03-26T04:53:34.687Z
+Stopped at: Completed 09-03-PLAN.md (Gitea Actions CI pipeline)
 Resume file: None