docs(P07): complete swallowed-error-hardening phase (v1.13.10)

---ci---
project: acdl
phase: 7
milestone: v1.14
status: complete
requirements:
  covered: [REQ-141]
  partial: []
---/ci---

terraform/bootstrap/create_state_backend.py

@@ -48,12 +48,16 @@ def main():
     try:
         s3.head_bucket(Bucket=STATE_BUCKET)
         print(f"s3: bucket {STATE_BUCKET} already exists")
-    except Exception:
-        kwargs = {"Bucket": STATE_BUCKET}
-        if REGION != "us-east-1":
-            kwargs["CreateBucketConfiguration"] = {"LocationConstraint": REGION}
-        s3.create_bucket(**kwargs)
-        print(f"s3: created bucket {STATE_BUCKET}")
+    except s3.exceptions.ClientError as e:
+        error_code = e.response.get("Error", {}).get("Code", "")
+        if error_code in ("404", "NoSuchBucket", "NotFound"):
+            kwargs = {"Bucket": STATE_BUCKET}
+            if REGION != "us-east-1":
+                kwargs["CreateBucketConfiguration"] = {"LocationConstraint": REGION}
+            s3.create_bucket(**kwargs)
+            print(f"s3: created bucket {STATE_BUCKET}")
+        else:
+            raise
     # Enable versioning (idempotent)
     s3.put_bucket_versioning(
         Bucket=STATE_BUCKET,