docs(12): create phase plan

.planning/STATE.md

@@ -2,14 +2,13 @@
 gsd_state_version: 1.0
 milestone: v0.3
 milestone_name: Reimagining Cloud Storage integration
-current_phase: 12
-status: planning
-last_updated: "2026-06-17"
-last_activity: 2026-06-17 -- v0.3 roadmap proposed
+status: executing
+last_updated: "2026-06-18T20:29:32.914Z"
+last_activity: 2026-06-18 -- Phase 12 planning complete
 progress:
   total_phases: 5
   completed_phases: 0
-  total_plans: 0
+  total_plans: 4
   completed_plans: 0
   percent: 0
 ---
@@ -17,15 +16,15 @@ progress:
 # Project State
 
 **Project:** DocuVault
-**Status:** v0.3 milestone planning — roadmap awaiting approval
+**Status:** Ready to execute
 **Last Updated:** 2026-06-17
 
 ## Current Position
 
 Phase: 12 of 16 — Cloud Resource Foundation
 Plan: —
-Status: Roadmap proposed; phase not yet planned
-Last activity: 2026-06-17 — v0.3 roadmap proposed
+Status: Ready to execute
+Last activity: 2026-06-18 -- Phase 12 planning complete
 
 ## Phase Status