docs(09-06): complete albums admin collection boundary plan

.planning/STATE.md

@@ -4,16 +4,16 @@ milestone: v1.0
 current_phase: 09
 current_phase_name: Backend admin authentication and schema pipeline
 status: executing
-stopped_at: Completed 09-05-PLAN.md
-last_updated: "2026-09-24T17:46:54.525Z"
+stopped_at: Completed 09-06-PLAN.md
+last_updated: "2026-09-24T18:21:51.771Z"
 last_activity: 2026-09-24
 last_activity_desc: Phase 09 execution started
-state_head: 50754808f61071e23746f3f36dde8a292a18360b
+state_head: 0caa86ec0b6d255dd22a55ee5923a40d3a821977
 progress:
   total_phases: 15
   completed_phases: 8
   total_plans: 67
-  completed_plans: 59
+  completed_plans: 61
 milestone_name: milestone
 ---
 
@@ -29,7 +29,7 @@ See: .planning/PROJECT.md (updated 2026-09-16)
 ## Current Position
 
 Phase: 09 (Backend admin authentication and schema pipeline) — EXECUTING
-Plan: 6 of 12
+Plan: 7 of 12
 Status: Ready to execute
 Last activity: 2026-09-24 — Phase 09 execution started
 
@@ -114,6 +114,7 @@ Progress: [██████████] 100%
 | Phase 09 P03 | 25min | 3 tasks | 10 files |
 | Phase 09 P04 | 36min | 3 tasks | 13 files |
 | Phase 09 P05 | 25min | 3 tasks | 8 files |
+| Phase 09 P06 | 29min | 3 tasks | 15 files |
 
 ## Accumulated Context
 
@@ -292,6 +293,10 @@ Recent decisions affecting current work:
 - [Phase 09]: Show and update use one not-found body for missing and out-of-scope rows; delete of an absent row is deleted 0 and does not run hooks
 - [Phase 09]: A bulk selection that matches no scoped row is a no-op; a mixed present and absent selection is a 409 and rolls back
 - [Phase 09]: Controller hook failures return an opaque lifecycle error and do not echo the hook text
+- [Phase 09]: Album admin D-14 stores collection_id of the one active frontend user matched by normalized backend email; no album user_id column was added
+- [Phase 09]: Winter relation keys match exported Go fields case-insensitively and the served JSON keeps the YAML spelling
+- [Phase 09]: Required relation fields stay on the admin form schema and are not save-time column rules
+- [Phase 09]: Genre and style admin option values are decimal strings because pact.Option.Value is a string
 
 ### Pending Todos
 
@@ -314,6 +319,6 @@ Items acknowledged and carried forward from previous milestone close:
 
 ## Session Continuity
 
-Last session: 2026-09-24T17:46:43.371Z
-Stopped at: Completed 09-05-PLAN.md
+Last session: 2026-09-24T18:21:51.437Z
+Stopped at: Completed 09-06-PLAN.md
 Resume file: None