Preserve tmpfs mount evidence through collection and queries

Docker can report tmpfs mounts only in HostConfig.Tmpfs. Preserve those
entries in shared inventory and retain type, options and canonical write
access in diagnostic queries. Configured size is not measured free space.

Record the failed ordinary storage diagnosis and independently verified
recovery without claiming autonomous or installed-collector qualification.

scripts/release_control/canonical_completion_guard_test.py

@@ -356,6 +356,7 @@ class CanonicalCompletionGuardTest(unittest.TestCase):
                         "internal/dockeragent/agent_cpu_test.go",
                         "internal/dockeragent/agent_internal_test.go",
                         "internal/dockeragent/blockio_presence_test.go",
+                        "internal/dockeragent/collect_tmpfs_test.go",
                         "internal/dockeragent/swarm_coverage_test.go",
                     ],
                 }