docs(01-01): clear Task 3 checkpoint, mark plan complete

Stack verified live (/health green, 4 tables pushed). Record Docker deviation in
SUMMARY, mark 01-01 complete in ROADMAP, clean up paused-setup handoff files.

.planning/STATE.md

@@ -2,14 +2,14 @@
 gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
-status: planning
+status: executing
 stopped_at: Phase 1 context gathered
-last_updated: "2026-06-04T11:55:07.999Z"
-last_activity: 2026-06-03 — Roadmap created
+last_updated: "2026-06-04T13:45:46.863Z"
+last_activity: 2026-06-04 -- Phase 01 execution started
 progress:
   total_phases: 5
   completed_phases: 0
-  total_plans: 0
+  total_plans: 4
   completed_plans: 0
   percent: 0
 ---
@@ -21,14 +21,14 @@ progress:
 See: .planning/PROJECT.md (updated 2026-06-03)
 
 **Core value:** One color-coded family calendar (shared + personal) and shared lists from a single low-friction PWA — cross-ecosystem, no app store
-**Current focus:** Phase 1 — Foundation + Broker Spike
+**Current focus:** Phase 01 — foundation-broker-spike
 
 ## Current Position
 
-Phase: 1 of 5 (Foundation + Broker Spike)
-Plan: 0 of ? in current phase
-Status: Ready to plan
-Last activity: 2026-06-03 — Roadmap created
+Phase: 01 (foundation-broker-spike) — EXECUTING
+Plan: 1 of 4
+Status: Executing Phase 01
+Last activity: 2026-06-04 -- Phase 01 execution started
 
 Progress: [░░░░░░░░░░] 0%