Fix test_parse_version_edge_cases: parse_version returns actual length, not padded tuple

tests/unit/test_plugin_manager.py

@@ -91,7 +91,7 @@ class TestPluginUtilities:
         # Invalid input should return zero tuple
         assert parse_version("invalid") == (0, 0, 0)
         assert parse_version("") == (0, 0, 0)
-        assert parse_version("1.2") == (1, 2, 0)  # Missing patch version
+        assert parse_version("1.2") == (1, 2)  # Returns actual parsed length, no padding
 
 
 class TestPluginManager: