fix: narrow exception in Content-Length header lookup from Exception to AttributeError

Bare 'except Exception' would swallow MemoryError, RecursionError,
etc. The only realistic failure from getheader() is AttributeError.

Author: Quratulain-bilal

src/specify_cli/workflows/_commands.py

@@ -429,7 +429,7 @@ def _read_response_within_limit(response, max_bytes: int | None = None) -> bytes
     if callable(getheader):
         try:
             raw_length = getheader("Content-Length")
-        except Exception:
+        except AttributeError:
             raw_length = None
         if raw_length is not None:
             try: