fix: migration runner and scan logging fixes

- Fix migration conflicts and duplicate key errors
- Remove duplicate scan logging from agents
- Fix AgentHealth UI and Storage page triggers
- Prevent scans from appearing on wrong pages

Fixes duplicate key violations on fresh installs and
storage scans appearing on Updates page.

aggregator-web/src/components/AgentStorage.tsx

@@ -66,13 +66,13 @@ export function AgentStorage({ agentId }: AgentStorageProps) {
   const handleFullStorageScan = async () => {
     setIsScanning(true);
     try {
-      // Trigger a system scan to get full disk inventory
-      await agentApi.scanAgent(agentId);
-      toast.success('Full storage scan initiated');
+      // Trigger storage scan only (not full system scan)
+      await agentApi.triggerSubsystem(agentId, 'storage');
+      toast.success('Storage scan initiated');
 
       // Refresh data after a short delay
       setTimeout(() => {
-        refetchAgent();
+        refetchStorage();
         setIsScanning(false);
       }, 3000);
     } catch (error) {