Fix NinjaOne API integration and patch parsing

- Use us2.ninjarmm.com instance (not app.ninjarmm.com)
- Handle results wrapper in API responses
- Parse impact field for severity (critical/high/medium/low)
- Fetch all patches, not just pending

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

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

config.example.py

@@ -5,6 +5,6 @@ NINJAONE_CONFIG = {
     'client_id': 'your_client_id',
     'client_secret': 'your_client_secret',
     'base_url': 'https://app.ninjarmm.com',  # or your regional URL
-    'token_url': 'https://app.ninjarmm.com/oauth/token',
+    'token_url': 'https://app.ninjarmm.com/ws/oauth/token',
     'scope': 'monitoring management'
 }