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/cmd/deacon.go

@@ -410,6 +410,7 @@ func ensurePatrolHooks(workspacePath string) error {
 	}
 
 	// Standard patrol hooks
+	// Note: SessionStart nudges Deacon for GUPP backstop (agent wake notification)
 	hooksJSON := `{
   "hooks": {
     "SessionStart": [
@@ -418,7 +419,7 @@ func ensurePatrolHooks(workspacePath string) error {
         "hooks": [
           {
             "type": "command",
-            "command": "gt prime && gt mail check --inject"
+            "command": "gt prime && gt mail check --inject && gt nudge deacon session-started"
           }
         ]
       }