test(compose): pin the GPU count the file list now depends on

Both modules pin every environment variable compose_file_args() reads. Adding Profile.gpu_reservable() in 4d09286d8b added INFINITO_GPU_COUNT as a reader without pinning it, so the expectation silently followed the ambient environment: green on a shell that has no such variable, red in the test container where BASH_ENV injects .env and this host reads 'all'. That was eight of the unit failures in the gate.

Pin it to 0 in the three affected fixtures and add the two cases the gate never had: no GPU means no override, a non-zero count adds it.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

tests/unit/python/cli/administration/deploy/development/test_compose.py

@@ -95,6 +95,7 @@ class TestComposeUpRetries(unittest.TestCase):
             "INFINITO_GIT_COMMON_DIR": "",
             "INFINITO_CACHE_NETWORK": "",
             "INFINITO_CACHE_STACK": "",
+            "INFINITO_GPU_COUNT": "0",
         },
         clear=False,
     )
@@ -146,6 +147,7 @@ class TestComposeUpRetries(unittest.TestCase):
             "INFINITO_GIT_COMMON_DIR": "",
             "INFINITO_CACHE_NETWORK": "",
             "INFINITO_CACHE_STACK": "",
+            "INFINITO_GPU_COUNT": "0",
         },
         clear=False,
     )

tests/unit/python/cli/administration/deploy/development/test_env_compose_file_args.py

@@ -22,6 +22,7 @@ _LOCAL_PRIMARY = {
     "INFINITO_CACHE_NETWORK": "",
     "INFINITO_CACHE_STACK": "",
     "INFINITO_PUBLISH_PORTS": "",
+    "INFINITO_GPU_COUNT": "0",
 }
 
 _WORKTREE = {
@@ -124,6 +125,18 @@ class TestComposeFileArgs(unittest.TestCase):
     def test_unpublished_ports_add_the_noports_override(self) -> None:
         self.assertIn("compose/noports.override.yml", compose_file_args())
 
+    @patch.dict(os.environ, _LOCAL_PRIMARY, clear=False)
+    def test_a_host_without_a_gpu_reserves_none(self) -> None:
+        self.assertNotIn("compose/gpu.override.yml", compose_file_args())
+
+    @patch.dict(
+        os.environ,
+        {**_LOCAL_PRIMARY, "INFINITO_GPU_COUNT": "all"},
+        clear=False,
+    )
+    def test_a_host_with_a_gpu_adds_the_reservation(self) -> None:
+        self.assertIn("compose/gpu.override.yml", compose_file_args())
+
 
 if __name__ == "__main__":  # pragma: no cover
     unittest.main()