docs(09-07): complete artists admin controller 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 09-06-PLAN.md
-last_updated: "2026-09-24T18:21:51.771Z"
-last_activity: 2026-09-24
+stopped_at: Completed 09-07-PLAN.md
+last_updated: "2026-09-25T19:49:37.835Z"
+last_activity: 2026-09-25
 last_activity_desc: Phase 09 execution started
-state_head: 0caa86ec0b6d255dd22a55ee5923a40d3a821977
+state_head: fe639ac0d32a7a1c37d897f604fdf21f478b9854
 progress:
   total_phases: 15
   completed_phases: 8
   total_plans: 67
-  completed_plans: 61
+  completed_plans: 62
 milestone_name: milestone
 ---
 
@@ -29,9 +29,9 @@ See: .planning/PROJECT.md (updated 2026-09-16)
 ## Current Position
 
 Phase: 09 (Backend admin authentication and schema pipeline) — EXECUTING
-Plan: 7 of 12
+Plan: 8 of 12
 Status: Ready to execute
-Last activity: 2026-09-24 — Phase 09 execution started
+Last activity: 2026-09-25 — Phase 09 execution started
 
 Progress: [██████████] 100%
 
@@ -115,6 +115,7 @@ Progress: [██████████] 100%
 | Phase 09 P04 | 36min | 3 tasks | 13 files |
 | Phase 09 P05 | 25min | 3 tasks | 8 files |
 | Phase 09 P06 | 29min | 3 tasks | 15 files |
+| Phase 09 P07 | 2h20m | 2 tasks | 9 files |
 
 ## Accumulated Context
 
@@ -297,6 +298,8 @@ Recent decisions affecting current work:
 - [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
+- [Phase 09]: Artists uses only the shared cabana list and CRUD engines; the controller contains identity, asset paths, model factory, and permission declaration only
+- [Phase 09]: Artist name_key and slug remain model-owned lifecycle fields and are not exposed by the admin writable projection
 
 ### Pending Todos
 
@@ -319,6 +322,6 @@ Items acknowledged and carried forward from previous milestone close:
 
 ## Session Continuity
 
-Last session: 2026-09-24T18:21:51.437Z
-Stopped at: Completed 09-06-PLAN.md
+Last session: 2026-09-25T19:49:37.540Z
+Stopped at: Completed 09-07-PLAN.md
 Resume file: None