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,
     )