Add fallback for __version__ using importlib.metadata

If _version import fails, use importlib.metadata to set __version__. This improves compatibility for development installs where _version may not be present.

Author: edeno

src/track_linearization/__init__.py

@@ -11,4 +11,7 @@
 try:
     from ._version import __version__
 except ImportError:
-    pass
+    # Fallback for development installs
+    from importlib.metadata import version
+
+    __version__ = version("track_linearization")