docs(P00): clarify — v1.15-Nova decisions D-102..D-112 locked

Full-autonomy CLARIFY: 11 decisions resolved. D-102..D-107 (high-judgment
scope) locked by user during planning: full rename w/ migration (AWS
resources, env vars, tag keys, SSM path, consumer path); illustrative
URLs updated; Nova tagline added alongside North Star; S&P theme
untouched. D-108..D-112 (CLARIFY): dual-read helper in core/env.py;
Checkov warn-then-hard across P2/P3; schema $id URLs rebranded; Lambda
defaults deferred to P4; flat-branch convention preserved.

---ci---
project: acdl
phase: 0
milestone: v1.15
status: clarify
---/ci---

.ciagent/CHECKPOINT.json

@@ -1,9 +1,9 @@
 {
   "phase": 0,
-  "stage": "specify",
+  "stage": "research",
   "milestone": "v1.15",
   "phase_role": "pre_execution",
   "attempts": 0,
-  "updated_at": "2026-07-30T00:00:00Z",
+  "updated_at": "2026-07-30T00:02:00Z",
   "milestone_complete": false
 }