Add __version__ to __all__ exports

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: antoineleclair

src/dqlitedbapi/__init__.py

@@ -41,6 +41,7 @@
 
 __all__ = [
     # Module attributes
+    "__version__",
     "apilevel",
     "threadsafety",
     "paramstyle",

tests/test_version_export.py

@@ -0,0 +1,11 @@
+"""Test that __version__ is in __all__."""
+
+import dqlitedbapi
+
+
+class TestVersionExport:
+    def test_version_in_all(self) -> None:
+        assert "__version__" in dqlitedbapi.__all__
+
+    def test_version_is_string(self) -> None:
+        assert isinstance(dqlitedbapi.__version__, str)