fix: Update signing

Author: tmathern

src/c2pa/c2pa.py

@@ -1852,7 +1852,7 @@ def _sign_internal(
             signer: Signer,
             format: str,
             source_stream: Stream,
-            dest_stream: Stream) -> tuple[int, bytes]:
+            dest_stream: Stream) -> bytes:
         """Internal signing logic shared between sign() and sign_file() methods,
         to use same native calls but expose different API surface.
 
@@ -1946,7 +1946,7 @@ def sign_file(self,
                                      Path],
                   dest_path: Union[str,
                                    Path],
-                  signer: Signer) -> tuple[int, bytes]:
+                  signer: Signer) -> bytes:
         """Sign a file and write the signed data to an output file.
 
         Args:

test.txt

@@ -0,0 +1 @@
+python3 ./tests/test_unit_tests.py

tests/test_unit_tests.py

@@ -1568,6 +1568,8 @@ def test_sign_file(self):
                 "name": "python_internals_test",
                 "version": "0.0.1",
             }],
+            # Claim version has become mandatory for signing v1 claims
+            "claim_version": 1,
             "format": "image/jpeg",
             "title": "Python Test Signed Image",
             "ingredients": [],