docs(19-03): complete global item tag filtering and COALESCE merge plan

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.3
 milestone_name: Research & Decision Tools
 status: executing
-stopped_at: Completed 19-02-PLAN.md
-last_updated: "2026-04-05T18:51:11.895Z"
+stopped_at: Completed 19-03-PLAN.md
+last_updated: "2026-04-05T22:27:05.589Z"
 last_activity: 2026-04-05
 progress:
   total_phases: 13
-  completed_phases: 11
+  completed_phases: 12
   total_plans: 36
-  completed_plans: 33
+  completed_plans: 34
   percent: 3
 ---
 
@@ -26,7 +26,7 @@ See: .planning/PROJECT.md (updated 2026-04-03)
 ## Current Position
 
 Phase: 19 of 19 (Reference Item Model & Tags Schema)
-Plan: 2 of 3
+Plan: 3 of 3
 Status: Ready to execute
 Last activity: 2026-04-05
 
@@ -59,6 +59,7 @@ Key decisions made during v2.0 planning:
 - [Phase 19]: Data migration SQL: UPDATE items before DROP TABLE item_global_links
 - [Phase 19]: Flat tags system without type categorization per D-16
 - [Phase 19-reference-item-model-tags-schema]: COALESCE merge pattern for transparent reference item data in item/thread services
+- [Phase 19-reference-item-model-tags-schema]: COALESCE merge pattern propagated to all secondary services (setup, totals, profile, CSV)
 
 ### Pending Todos
 
@@ -71,6 +72,6 @@ None active.
 
 ## Session Continuity
 
-Last session: 2026-04-05T18:51:11.893Z
-Stopped at: Completed 19-02-PLAN.md
+Last session: 2026-04-05T22:27:05.587Z
+Stopped at: Completed 19-03-PLAN.md
 Resume file: None