docs(02-01): complete daemon vmuxd plan

- SUMMARY.md with protocol types, registry, labels, socket server
- STATE.md updated: plan 3/3, decisions, metrics
- ROADMAP.md updated: phase 02 progress
- REQUIREMENTS.md: DISC-04, STATE-04 complete

.planning/ROADMAP.md

@@ -47,8 +47,8 @@ Plans:
 **Plans**: TBD
 
 Plans:
-- [ ] 02-01: TBD
-- [ ] 02-02: TBD
+- [x] 02-01: TBD
+- [x] 02-02: TBD
 
 ### Phase 3: Hook Server
 **Goal**: Les transitions d'etat sont detectees en moins d'une seconde grace aux hooks push de Claude Code