docs(14-04): complete route handlers async conversion plan

- Add 14-04-SUMMARY.md documenting async conversion of all 9 route files and auth middleware
- Update STATE.md with progress (83%) and decisions
- Update ROADMAP.md with plan progress

.planning/STATE.md

@@ -2,15 +2,15 @@
 gsd_state_version: 1.0
 milestone: v1.3
 milestone_name: Research & Decision Tools
-status: executing
-stopped_at: Completed 14-03-PLAN.md
-last_updated: "2026-04-04T10:36:27.232Z"
+status: verifying
+stopped_at: Completed 14-04-PLAN.md
+last_updated: "2026-04-04T10:44:47.042Z"
 last_activity: 2026-04-04
 progress:
   total_phases: 8
   completed_phases: 6
   total_plans: 18
-  completed_plans: 14
+  completed_plans: 15
   percent: 0
 ---
 
@@ -27,7 +27,7 @@ See: .planning/PROJECT.md (updated 2026-04-03)
 
 Phase: 14 of 18 (PostgreSQL Migration)
 Plan: 6 of 6 in current phase
-Status: Ready to execute
+Status: Phase complete — ready for verification
 Last activity: 2026-04-04
 
 Progress: [----------] 0% (v2.0 milestone)
@@ -58,6 +58,7 @@ Key decisions made during v2.0 execution:
 - Single-user SQLite mode diverges at v2.0 boundary
 - [Phase 14-03]: Async service pattern: const [row] = await db.select()... for single-row queries
 - [Phase 14-03]: OAuth used field converted from integer (0/1) to boolean (false/true)
+- [Phase 14-04]: Settings route .get() replaced with destructuring: const [row] = await db.select()...
 
 ### Pending Todos
 
@@ -70,6 +71,6 @@ None active.
 
 ## Session Continuity
 
-Last session: 2026-04-04T10:36:27.230Z
-Stopped at: Completed 14-03-PLAN.md
+Last session: 2026-04-04T10:44:47.040Z
+Stopped at: Completed 14-04-PLAN.md
 Resume file: None