test: Add test for native MySQL unsigned types pass-through

- Tests that 'int unsigned', 'bigint unsigned', etc. are allowed
- Documents that these are MySQL-specific, not portable
- Users should prefer signed core types for compatibility

Also bump version to 2.0.0a22

Author: dimitri-yatsenko

src/datajoint/version.py

@@ -1,4 +1,4 @@
 # version bump auto managed by Github Actions:
 # label_prs.yaml(prep), release.yaml(bump), post_release.yaml(edit)
 # manually set this version will be eventually overwritten by the above actions
-__version__ = "2.0.0a21"
+__version__ = "2.0.0a22"

tests/integration/test_type_aliases.py

@@ -65,6 +65,26 @@ def test_native_types_still_work(self, native_type, expected_category):
         category = match_type(native_type)
         assert category == expected_category
 
+    @pytest.mark.parametrize(
+        "native_type,expected_category",
+        [
+            ("int unsigned", "INTEGER"),
+            ("bigint unsigned", "INTEGER"),
+            ("smallint unsigned", "INTEGER"),
+            ("tinyint unsigned", "INTEGER"),
+        ],
+    )
+    def test_native_unsigned_types_pass_through(self, native_type, expected_category):
+        """
+        Test that native MySQL unsigned types are allowed as pass-through.
+
+        Note: These are MySQL-specific and not portable to PostgreSQL.
+        Users should prefer signed core types (int8, int16, int32, int64)
+        for cross-database compatibility.
+        """
+        category = match_type(native_type)
+        assert category == expected_category
+
 
 class TestTypeAliasTableCreation:
     """Test table creation with type aliases."""