feat(P4): Nova rebrand — AWS resource migration (REQ-163)

Rename all acdl-* AWS resources → nova-* across terraform (DynamoDB,
Secrets Manager, Lambda, SNS, SG, KMS alias, ECS, ECR, IAM user/policy,
state bucket, ALB, VPC/subnet names). Lambda default table names → nova-*
(D-111). State bucket backend → nova-tfstate (-migrate-state documented).
New docs/NOVA_AWS_MIGRATION.md runbook (staged migration + rollback).
New scripts/migrate_dynamodb_data.py (scan+copy, dry-run default).
acdl-deploy- → nova-deploy- role ARN in deploy workflows. Test fixtures
updated; terraform validate + pytest + run_ci.sh PASS.

---ci---
project: acdl
phase: 4
milestone: v1.15
status: execute
---/ci---

tests/test_contract_resolver.py

@@ -67,7 +67,7 @@ class TestResolveMicroservice:
                 "microservice": {
                     "version": "1.0.0",
                     "inputs": {
-                        "image": "581513795199.dkr.ecr.us-east-1.amazonaws.com/acdl-microservice:latest",
+                        "image": "581513795199.dkr.ecr.us-east-1.amazonaws.com/nova-microservice:latest",
                         "port": 8080,
                         "region": "us-east-1",
                     },