Fix USB policy reporting and improve agent reliability

- Fix Zod schema to accept null values (nullable) for error/currentPolicy
- Add robust logging system writing to raven-agent.log file
- Rewrite auto-start using winreg with validation
- Auto-start agent on app setup if credentials exist
- Reduce retry attempts to 2 (1 + 1 retry after 2s)
- Replace provider's remote access on ID change (prevents duplicates)
- Update agent to v0.2.0

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

convex/machines.ts

@@ -2318,10 +2318,19 @@ async function upsertRemoteAccessSnapshotFromHeartbeat(
   if (!identifier) return
 
   const existingEntries = normalizeRemoteAccessList(machine.remoteAccess)
-  const idx = existingEntries.findIndex(
+
+  // Busca primeiro por provider + identifier (atualização exata)
+  let idx = existingEntries.findIndex(
     (entry) => entry.provider.toLowerCase() === provider.toLowerCase() && entry.identifier.toLowerCase() === identifier.toLowerCase()
   )
 
+  // Se não encontrou, busca apenas por provider (substituição - ex: RustDesk ID mudou)
+  if (idx < 0) {
+    idx = existingEntries.findIndex(
+      (entry) => entry.provider.toLowerCase() === provider.toLowerCase()
+    )
+  }
+
   const entryId = idx >= 0 ? existingEntries[idx].id : createRemoteAccessId()
   const metadata = {
     ...(normalized.metadata ?? {}),