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>

apps/desktop/src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "Raven",
-  "version": "0.1.9",
+  "version": "0.2.0",
   "identifier": "br.com.esdrasrenan.sistemadechamados",
   "build": {
     "beforeDevCommand": "bun run dev",