Use importlib.metadata for __version__ to avoid drift

Author: Berik Ashimov

src/hawkapi_sqlalchemy/__init__.py

@@ -6,6 +6,8 @@
 
 from __future__ import annotations
 
+from importlib.metadata import PackageNotFoundError, version
+
 from ._alembic import run_migrations
 from ._database import Database, init_database, resolve_database
 from ._engine import DatabaseConfig, Engine, create_engine
@@ -14,7 +16,10 @@
 from ._session import get_replica_session, get_session, open_session, session_for
 from ._testing import temporary_database, temporary_session
 
-__version__ = "0.2.0"
+try:
+    __version__ = version("hawkapi-sqlalchemy")
+except PackageNotFoundError:  # pragma: no cover - running from a source tree without install
+    __version__ = "0.0.0"
 
 __all__ = [
     "Base",