verify(P1): Nova rebrand docs/decks/prose — 4-layer verify PASS

VERIFY (4 layers): structural — 57 files rebranded, JSON schemas valid,
pyproject name=nova; behavioral — run_ci.sh 3-stage PASS (lint+test+
check-only); security — no creds touched, S&P theme untouched (D-107);
quality — grep-zero on prose-identity ACDL (remaining hits are justified
literals for P2/P3/P4: env vars, resource names, tag keys, paths, real
repo uses: refs). Mermaid 5/5 PNGs re-exported. Nova tagline added to
README + decks + vision.md (North Star retained, D-106).
NOVA_MIGRATION.md consumer guide shipped.

---ci---
project: acdl
phase: 1
milestone: v1.15
status: verify
requirements_covered: [REQ-155, REQ-156, REQ-157]
---/ci---

.ciagent/CHECKPOINT.json

@@ -1,11 +1,11 @@
 {
-  "phase": 0,
+  "phase": 1,
   "stage": "complete",
   "milestone": "v1.15",
-  "phase_role": "pre_execution",
+  "phase_role": "execution",
   "attempts": 0,
-  "updated_at": "2026-07-30T00:06:00Z",
+  "updated_at": "2026-07-30T00:07:00Z",
   "milestone_complete": false,
-  "release_id": 297,
-  "tag": "v1.15.0"
+  "requirements": ["REQ-155", "REQ-156", "REQ-157"],
+  "tag": "v1.15.1"
 }

.ciagent/REQUIREMENTS.md

@@ -819,9 +819,9 @@ IDEATE-01..IDEATE-10, mapped to REQ-155..REQ-164.
 
 | Requirement | Phase | Status |
 |-------------|-------|--------|
-| REQ-155 | P1 | pending |
-| REQ-156 | P1 | pending |
-| REQ-157 | P1 | pending |
+| REQ-155 | P1 | complete |
+| REQ-156 | P1 | complete |
+| REQ-157 | P1 | complete |
 | REQ-158 | P2 | pending |
 | REQ-159 | P2 | pending |
 | REQ-160 | P2 | pending |