Add version_description to user_runtime.python

`user_runtime.python_version` is deprecated, but that information is
still useful. The web service already expects `version_description`, so
we just need to add it here.

Author: chris-janidlo

changelog.d/20260310_144845_chris_add_version_description.rst

@@ -0,0 +1,6 @@
+New Functionality
+^^^^^^^^^^^^^^^^^
+
+- Added ``python.version_description`` to the ``user_runtime`` reserved template
+  variable. This contains the full version string from ``sys.version``, and replaces
+  the deprecated ``user_runtime.python`` field.

compute_sdk/globus_compute_sdk/sdk/batch.py

@@ -51,6 +51,9 @@ class PythonInfo:
         ----------
         version
             Python version string (e.g., ``"3.13.7"``)
+        version_description
+            Complete Python version string from ``sys.version`` (e.g.,
+            ``"3.13.7 (main, Sep 30 2025, 03:50:19) [GCC 14.2.0]"``)
         version_tuple
             Python version as a tuple (e.g., ``(3, 13, 7)``)
         version_info
@@ -64,6 +67,7 @@ class PythonInfo:
         """
 
         version: str
+        version_description: str
         version_tuple: tuple[int, int, int]
         version_info: tuple[int, int, int, str, int]
         implementation: str
@@ -108,6 +112,7 @@ def create_user_runtime() -> UserRuntime:
         python_version=sys.version,
         python=UserRuntime.PythonInfo(
             version=platform.python_version(),
+            version_description=sys.version,
             version_tuple=sys.version_info[:3],
             version_info=tuple(sys.version_info),  # type: ignore[arg-type]
             compiler=platform.python_compiler(),

compute_sdk/tests/unit/test_client.py

@@ -315,6 +315,7 @@ def test_batch_includes_user_runtime_info(gcc):
         "python_version": sys.version,
         "python": {
             "version": platform.python_version(),
+            "version_description": sys.version,
             "version_tuple": sys.version_info[:3],
             "version_info": tuple(sys.version_info),
             "implementation": platform.python_implementation(),