docs(FN-4751): complete Step 1 — codify manual pull non-recording contract

Fusion-Task-Id: FN-4751
Fusion-Task-Lineage: 2f6d2360-fcd6-4186-bb58-a35fa40a78fb

packages/dashboard/src/routes/register-settings-sync-routes.ts

@@ -182,6 +182,11 @@ export const registerSettingsSyncRoutes: ApiRouteRegistrar = (ctx) => {
       };
 
       if (conflictResolution === "manual") {
+        // Manual conflict resolution is a read-only inspection probe — do NOT call
+        // central.updateSettingsSyncState(...) here. SettingsSyncState.lastSyncedAt
+        // represents the last successful settings sync; mutating it on a diff probe
+        // would corrupt the contract and lie to sync-status. Parallel to
+        // GET /nodes/:id/settings/sync-status, which is also read-only.
         // Get local settings for diff comparison
         const localProjectSettings = await store.getSettingsByScope();
         const localGlobalSettings = await store.getGlobalSettingsStore().getSettings();