Clarify MinIO get() error semantics to match Redis behavior.

Return None only for missing objects and re-raise other S3 and network failures so callers can distinguish not-found from real errors.

Co-authored-by: Cursor <[email protected]>

tests/integration/minio_adapter_test.py

@@ -218,10 +218,8 @@ def test_should_log_warning_when_getting_nonexistent_object(
     )
 
 
-def test_should_log_error_when_getting_with_s3error_other_than_no_such_key(
-    caplog: pytest.LogCaptureFixture,
-) -> None:
-    """Test that the MinioAdapter logs an error for unhandled S3 errors."""
+def test_should_reraise_s3error_other_than_no_such_key() -> None:
+    """Test that the MinioAdapter re-raises unhandled S3 errors."""
     mock_client = MagicMock(spec=Minio)
     mock_client.bucket_exists.return_value = True
     other_s3error = S3Error(
@@ -236,25 +234,20 @@ def test_should_log_error_when_getting_with_s3error_other_than_no_such_key(
     )
     mock_client.get_object.side_effect = other_s3error
     adapter = MinioAdapter(config=TEST_MINIO_CONFIG, client=mock_client)
-    with caplog.at_level("ERROR"):
-        result = adapter.get("missing-object")
-    assert result is None
-    assert repr(other_s3error) in caplog.text
+    with pytest.raises(S3Error) as exc_info:
+        adapter.get("missing-object")
+    assert exc_info.value.code == "UnhandledError"
 
 
-def test_should_log_error_when_getting_with_general_exception(
-    caplog: pytest.LogCaptureFixture,
-) -> None:
-    """Test that the MinioAdapter logs an error on general exceptions during get."""
+def test_should_reraise_general_exception() -> None:
+    """Test that the MinioAdapter re-raises general exceptions during get."""
     mock_client = MagicMock(spec=Minio)
     mock_client.bucket_exists.return_value = True
     general_exception = Exception("General failure")
     mock_client.get_object.side_effect = general_exception
     adapter = MinioAdapter(config=TEST_MINIO_CONFIG, client=mock_client)
-    with caplog.at_level("ERROR"):
-        result = adapter.get("missing-object")
-    assert result is None
-    assert repr(general_exception) in caplog.text
+    with pytest.raises(Exception, match="General failure"):
+        adapter.get("missing-object")
 
 
 def test_should_put_data(