fix(policy): respect external policy authority

ci/onboard-entry-composition-budget.json

@@ -21,7 +21,6 @@
     "handleRemoteProviderSelection": 84,
     "handleRemoteProviderSelection.providerExistsInGateway": 1,
     "handleRemoteProviderSelection.readGatewayProviderMetadata": 1,
-    "handleRoutedSelection": 16,
     "handleVllmSelection.queryVllmModels": 1,
     "preflightAuthoritativeRebuildTarget": 1,
     "runOnboard": 8,

ci/source-architecture-budget.json

@@ -41,17 +41,17 @@
       "src/lib/actions/sandbox/destroy.ts": 29,
       "src/lib/actions/sandbox/doctor.ts": 29,
       "src/lib/actions/sandbox/status-snapshot.ts": 20,
-      "src/lib/actions/sandbox/policy-channel.ts": 30,
+      "src/lib/actions/sandbox/policy-channel.ts": 29,
       "src/lib/actions/sandbox/process-recovery.ts": 21,
       "src/lib/actions/sandbox/rebuild-pipeline.ts": 29,
       "src/lib/actions/sandbox/snapshot.ts": 40,
       "src/lib/actions/uninstall/run-plan.ts": 25,
       "src/lib/inference/local.ts": 22,
       "src/lib/inference/onboard-probes.ts": 21,
       "src/lib/inference/vllm.ts": 21,
-      "src/lib/onboard.ts": 201,
+      "src/lib/onboard.ts": 202,
       "src/lib/onboard/machine/handlers/sandbox.ts": 21,
-      "src/lib/policy/index.ts": 22,
+      "src/lib/policy/index.ts": 23,
       "src/lib/sandbox/config.ts": 22,
       "src/lib/shields/index.ts": 23
     }

ci/test-file-size-budget.json

@@ -8,7 +8,7 @@
     "test/generate-openclaw-config.test.ts": 1907,
     "test/install-preflight.test.ts": 3025,
     "test/nemoclaw-start.test.ts": 4671,
-    "test/onboard-messaging.test.ts": 2028,
+    "test/onboard-messaging.test.ts": 2027,
     "test/onboard-selection.test.ts": 4177
   }
 }