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---

.github/workflows/deploy.yml

@@ -43,7 +43,7 @@
 #   as repository secrets. The platform-managed scheduled pipeline rotates
 #   the key on a daily cadence. When .env.secrets is used locally instead,
 #   rotating the key out of band is the consumer's responsibility.
-name: acdl-deploy
+name: nova-deploy
 
 on:
   workflow_call:
@@ -102,11 +102,8 @@ jobs:
       - name: Configure AWS credentials (OIDC default + static-key override)
         uses: aws-actions/configure-aws-credentials@v4
         with:
-          # TODO(P4, REQ-163): rename the IAM role acdl-deploy- → nova-deploy-.
-          # The role ARN string is left as acdl-deploy- until P4 (IAM role
-          # rename territory); only the secret REFERENCES are updated to
-          # NOVA_* in P2 (G-108 binding).
-          role-to-assume: ${{ secrets.NOVA_AWS_ACCESS_KEY_ID == '' && format('arn:aws:iam::{0}:role/acdl-deploy-{1}', secrets.NOVA_AWS_ACCOUNT_ID, github.repository_id) || '' }}
+          # P4 (REQ-163): IAM role renamed acdl-deploy- → nova-deploy-.
+          role-to-assume: ${{ secrets.NOVA_AWS_ACCESS_KEY_ID == '' && format('arn:aws:iam::{0}:role/nova-deploy-{1}', secrets.NOVA_AWS_ACCOUNT_ID, github.repository_id) || '' }}
           aws-region: us-east-1
           access-key-id: ${{ secrets.NOVA_AWS_ACCESS_KEY_ID }}
           secret-access-key: ${{ secrets.NOVA_AWS_SECRET_ACCESS_KEY }}
@@ -157,13 +154,13 @@ jobs:
       - name: Upload emitted Terraform
         uses: actions/upload-artifact@v4
         with:
-          name: acdl-terraform
+          name: nova-terraform
           path: /tmp/acdl_platform_run_v18/tf/*.tf
           if-no-files-found: warn
 
       - name: Upload platform log
         uses: actions/upload-artifact@v4
         with:
-          name: acdl-platform-log
+          name: nova-platform-log
           path: platform/logs/
           if-no-files-found: warn