Export __version__ via __all__

PEP 396 convention: ``__version__`` is the canonical module-level
version handle. Advertise it in ``__all__`` so
``from sqlalchemydqlite import *`` binds it and static-analysis tools
that read ``__all__`` as the source of truth see it as public.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: antoineleclair

src/sqlalchemydqlite/__init__.py

@@ -2,6 +2,6 @@
 
 from sqlalchemydqlite.base import DqliteDialect
 
-__all__ = ["DqliteDialect"]
+__all__ = ["DqliteDialect", "__version__"]
 
 __version__ = "0.1.3"

tests/test_version.py

@@ -11,3 +11,8 @@ def test_pyproject_matches_package_version() -> None:
     with pyproject.open("rb") as f:
         metadata = tomllib.load(f)
     assert metadata["project"]["version"] == sqlalchemydqlite.__version__
+
+
+def test_version_is_in_all() -> None:
+    """PEP 396 convention: ``__version__`` is a public module attribute."""
+    assert "__version__" in sqlalchemydqlite.__all__