fix(python): set LsmWriteSpec module metadata (#3995)

PyO3 exposed `LsmWriteSpec` with its default `builtins` module, causing
mkdocstrings to resolve the public `lancedb.LsmWriteSpec` re-export as
`builtins.LsmWriteSpec` and fail the documentation build. Declare the
native extension module and pin the public re-export with a regression
test.

This also applies the repository's current Ruff formatter to seven
previously unformatted Python scripts.

python/python/tests/test_lsm_write_spec.py

@@ -21,6 +21,11 @@ SCHEMA = pa.schema(
 )
 
 
+def test_lsm_write_spec_module_metadata():
+    assert lancedb.LsmWriteSpec is LsmWriteSpec
+    assert LsmWriteSpec.__module__ == "lancedb._lancedb"
+
+
 def _batch(ids, vs):
     return pa.RecordBatch.from_arrays(
         [pa.array(ids, type=pa.utf8()), pa.array(vs, type=pa.int32())],