docs(08): create phase plan

.planning/STATE.md

@@ -2,10 +2,10 @@
 gsd_state_version: 1.0
 milestone: v1.1
 milestone_name: Operability & Polish
-status: verifying
+status: executing
 stopped_at: Phase 8 context gathered
-last_updated: "2026-06-11T12:50:02.415Z"
-last_activity: 2026-06-11
+last_updated: "2026-06-11T13:34:48.221Z"
+last_activity: 2026-06-11 -- Phase 08 planning complete
 progress:
   total_phases: 14
   completed_phases: 1
@@ -27,8 +27,8 @@ See: .planning/PROJECT.md (updated 2026-06-10)
 
 Phase: 8
 Plan: Not started
-Status: Phase complete — ready for verification
-Last activity: 2026-06-11
+Status: Ready to execute
+Last activity: 2026-06-11 -- Phase 08 planning complete
 
 ## Performance Metrics