fix: Use packaging.version for proper version comparison

String comparison fails for versions like "2.10" vs "2.2"

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: dimitri-yatsenko

src/datajoint/migrate.py

@@ -24,11 +24,13 @@
 import warnings
 from typing import TYPE_CHECKING
 
+from packaging.version import Version
+
 from .errors import DataJointError
 from . import __version__
 
 # Show deprecation warning starting in 2.1
-if __version__ >= "2.1":
+if Version(__version__) >= Version("2.1"):
     warnings.warn(
         "datajoint.migrate is deprecated and will be removed in DataJoint 2.2. "
         "Complete your schema migrations before upgrading.",