docs(state): record phase 15 context session

.planning/STATE.md

@@ -1,17 +1,17 @@
 ---
 gsd_state_version: 1.0
-milestone: v1.3
-milestone_name: Research & Decision Tools
-status: verifying
-stopped_at: Completed 14-06-PLAN.md
-last_updated: "2026-04-04T13:41:56.485Z"
+milestone: v2.0
+milestone_name: Platform Foundation
+status: Not yet planned
+stopped_at: Phase 15 context gathered
+last_updated: "2026-04-04T18:15:44.234Z"
 last_activity: 2026-04-04
 progress:
-  total_phases: 8
-  completed_phases: 7
-  total_plans: 18
-  completed_plans: 16
-  percent: 0
+  total_phases: 9
+  completed_phases: 4
+  total_plans: 12
+  completed_plans: 10
+  percent: 20
 ---
 
 # Project State
@@ -21,22 +21,22 @@ progress:
 See: .planning/PROJECT.md (updated 2026-04-03)
 
 **Core value:** Help people make better gear decisions — discover what others use, compare real-world data, and see how a potential buy affects your setup before committing.
-**Current focus:** v2.0 Platform Foundation — Phase 14 (PostgreSQL Migration)
+**Current focus:** v2.0 Platform Foundation — Phase 15 (External Authentication)
 
 ## Current Position
 
-Phase: 14 of 18 (PostgreSQL Migration)
-Plan: 6 of 6 in current phase
-Status: Phase complete — ready for verification
+Phase: 15 of 18 (External Authentication)
+Plan: 0 of 0 in current phase
+Status: Not yet planned
 Last activity: 2026-04-04
 
-Progress: [----------] 0% (v2.0 milestone)
+Progress: [██--------] 20% (v2.0 milestone — 1/5 phases)
 
 ## Performance Metrics
 
 **Velocity:**
 
-- Total plans completed: 0 (v2.0 milestone)
+- Total plans completed: 6 (v2.0 milestone, Phase 14)
 - Average duration: --
 - Total execution time: --
 
@@ -62,6 +62,7 @@ Key decisions made during v2.0 execution:
 - [Phase 14-06]: Fixed PostgreSQL GROUP BY strictness in totals.service.ts
 - [Phase 14-06]: Added await to all MCP tool service calls (missed in plan 14-03)
 - [Phase 14-06]: Set test timeout to 30s for PGlite WASM overhead
+- [Phase 13]: Setup Impact Preview completed outside GSD workflow
 
 ### Pending Todos
 
@@ -70,10 +71,9 @@ None active.
 ### Blockers/Concerns
 
 - Auth provider decision (Logto vs Authentik) must be resolved before Phase 15 planning
-- Phase 14 is a full schema rewrite touching 6 services, 7 routes, 19 MCP tools, all tests
 
 ## Session Continuity
 
-Last session: 2026-04-04T13:41:56.482Z
-Stopped at: Completed 14-06-PLAN.md
-Resume file: None
+Last session: 2026-04-04T18:15:44.232Z
+Stopped at: Phase 15 context gathered
+Resume file: .planning/phases/15-external-authentication/15-CONTEXT.md