verify(P2): user-facing ACDL→Nova sweep — 4-layer verify PASS + ship

VERIFY: structural — all user-facing strings Nova; behavioral — 79 tests
+ CI PASS; security — no creds; quality — new onboarding Nova-header test.
REQ-166 complete. Internal ship_phase.sh helper added.

---ci---
project: acdl
phase: 2
milestone: v1.16
status: complete
phase_role: execution
requirements:
  covered: [REQ-166]
  partial: []
---/ci---

core/lambda/contract_ingestor.py

@@ -142,7 +142,7 @@ def _report_error(payload):
         raise RuntimeError(f"failed to read GitHub token from Secrets Manager: {e}")
 
     owner, repo = PLATFORM_REPO.split("/")
-    title = f"[ACDL-ALERT] Deploy failure: {consumer_repo} / {contract_id}"
+    title = f"[NOVA-ALERT] Deploy failure: {consumer_repo} / {contract_id}"
 
     # Check for an existing open issue with the same title (idempotency)
     # URL-encode the contract_id to prevent search-query injection (P1-1).
@@ -188,7 +188,7 @@ def _report_error(payload):
 {stack_trace}
 ```
 
-_This issue was auto-created by the ACDL platform Lambda (D-055). The consumer's onboarding-granted Lambda-invoke permission is the only grant needed._
+_This issue was auto-created by the Nova platform Lambda (D-055). The consumer's onboarding-granted Lambda-invoke permission is the only grant needed._
 """
 
     if existing: