Fix Python SDK package version

sdk_v2/python/src/foundry_local_sdk/version.py

@@ -1 +1,50 @@
-__version__ = "0.1.0"
+"""Package version.
+
+The version is single-sourced from ``pyproject.toml``'s ``[project] version``,
+which the release pipeline stamps from ``version-info/pyVersion.txt``. Nothing
+here needs updating on a version bump.
+
+For an installed wheel we read the metadata recorded at build time. When running
+straight from a source checkout (no dist-info, e.g. ``PYTHONPATH=src``) we fall
+back to parsing ``pyproject.toml`` so the reported version still matches the
+build inputs instead of a stale hardcoded literal.
+"""
+
+from __future__ import annotations
+
+from importlib.metadata import PackageNotFoundError, version as _dist_version
+from pathlib import Path
+
+_DISTRIBUTION_NAME = "foundry-local-sdk"
+_UNKNOWN = "0.0.0.dev0"
+
+
+def _version_from_pyproject() -> str | None:
+    # src/foundry_local_sdk/version.py -> sdk_v2/python/pyproject.toml
+    pyproject = Path(__file__).resolve().parents[2] / "pyproject.toml"
+    if not pyproject.is_file():
+        return None
+
+    try:
+        import tomllib
+    except ModuleNotFoundError:  # pragma: no cover - tomllib is stdlib on 3.11+
+        return None
+
+    try:
+        with pyproject.open("rb") as fh:
+            data = tomllib.load(fh)
+    except (OSError, ValueError):
+        return None
+
+    found = data.get("project", {}).get("version")
+    return found if isinstance(found, str) and found else None
+
+
+def _resolve_version() -> str:
+    try:
+        return _dist_version(_DISTRIBUTION_NAME)
+    except PackageNotFoundError:
+        return _version_from_pyproject() or _UNKNOWN
+
+
+__version__ = _resolve_version()