docs(P08): complete account-id-externalization phase (v1.13.11)

---ci---
project: acdl
phase: 8
milestone: v1.14
status: complete
requirements:
  covered: [REQ-142]
  partial: []
---/ci---

core/regression_verify.py

@@ -421,8 +421,10 @@ def _check_s3_state_bucket() -> Tuple[Status, str]:
         s3 = boto3.client("s3", region_name=env.get("AWS_DEFAULT_REGION", "us-east-1"),
                           aws_access_key_id=env.get("AWS_ACCESS_KEY_ID"),
                           aws_secret_access_key=env.get("AWS_SECRET_ACCESS_KEY"))
-        s3.head_bucket(Bucket="acdl-tfstate-581513795199-us-east-1")
-        r = s3.list_objects_v2(Bucket="acdl-tfstate-581513795199-us-east-1", MaxKeys=5)
+        account_id = os.environ.get("ACDL_AWS_ACCOUNT_ID", "581513795199")
+        state_bucket = f"acdl-tfstate-{account_id}-us-east-1"
+        s3.head_bucket(Bucket=state_bucket)
+        r = s3.list_objects_v2(Bucket=state_bucket, MaxKeys=5)
         keys = [o["Key"] for o in r.get("Contents", [])]
         return "Verified", f"state bucket exists, keys={keys}"
     except Exception as e: