docs(05-01): complete template data model and API plan

- Create 05-01-SUMMARY.md documenting migration, models, and query functions
- Update STATE.md with decisions, metrics, and progress bar (92%)
- Update ROADMAP.md phase 5 progress (1/2 plans complete)
- Mark requirements TMPL-01, TMPL-02, TMPL-04 complete in REQUIREMENTS.md

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.planning/config.json

@@ -5,7 +5,7 @@
   "commit_docs": true,
   "model_profile": "balanced",
   "workflow": {
-    "research": true,
+    "research": false,
     "plan_check": true,
     "verifier": true,
     "nyquist_validation": true,