Startup hooks nudge Deacon for GUPP backstop (gt-vdprb.3)

- Add special handling for 'deacon' target in gt nudge command
- Maps 'deacon' to gt-deacon session, gracefully handles if not running
- Add gt nudge deacon session-started to SessionStart hooks
- Updated settings-autonomous.json, settings-interactive.json, and
  ensurePatrolHooks() template

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

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

internal/claude/config/settings-interactive.json

@@ -9,7 +9,7 @@
         "hooks": [
           {
             "type": "command",
-            "command": "gt prime"
+            "command": "gt prime && gt nudge deacon session-started"
           }
         ]
       }