fix(worker): keep DLQ failures within the canonical taxonomy

app/worker/normalizer.py

@@ -113,6 +113,11 @@ def normalize_cdr_payload(
         return None, "malformed_json", None, None
     raw_id = payload.get("raw_id")
     raw_id_str = raw_id if isinstance(raw_id, str) else None
+    if raw_id_str is not None:
+        try:
+            raw_id_str.encode("utf-8")
+        except UnicodeError:
+            raw_id_str = None
     try:
         validate_structure(payload)
     except PayloadError as exc: