Add __version__ to SDK package (#125)

Uses importlib.metadata.version() to expose the package version at
runtime via everyrow.__version__, and adds a check to the version
consistency test to keep it in sync.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: CallumMcMahon

src/everyrow/__init__.py

@@ -1,10 +1,15 @@
+from importlib.metadata import version
+
 from everyrow.api_utils import create_client
 from everyrow.billing import BillingResponse, get_billing_balance
 from everyrow.session import create_session
 from everyrow.task import fetch_task_data
 
+__version__ = version("everyrow")
+
 __all__ = [
     "BillingResponse",
+    "__version__",
     "create_client",
     "create_session",
     "fetch_task_data",

tests/test_version.py

@@ -5,6 +5,8 @@
 import jsonschema
 import pytest
 
+import everyrow
+
 
 def test_version_consistency(pytestconfig: pytest.Config):
     """Check that version is consistent across pyproject.toml, plugin.json, gemini-extension.json, marketplace.json, everyrow-mcp/pyproject.toml, and everyrow-mcp/server.json."""
@@ -67,6 +69,9 @@ def test_version_consistency(pytestconfig: pytest.Config):
     assert pyproject_version == manifest_version, (
         f"pyproject.toml version ({pyproject_version}) != everyrow-mcp/manifest.json version ({manifest_version})"
     )
+    assert pyproject_version == everyrow.__version__, (
+        f"pyproject.toml version ({pyproject_version}) != everyrow.__version__ ({everyrow.__version__})"
+    )
 
 
 def test_server_json_schema(pytestconfig: pytest.Config):