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---

core/local_emulators.py

@@ -371,8 +371,9 @@ class LocalLambdaStub:
                 return _FakeResponse(
                     json.dumps([{"number": 1, "title": "stub"}]).encode())
             urllib.request.urlopen = _fake_urlopen
-        except Exception:
-            pass
+        except (AttributeError, TypeError) as e:
+            import sys
+            print(f"WARNING: could not patch urlopen for local Lambda stub: {e}", file=sys.stderr)
 
         try:
             event = {