hub v0.3.3: Fix version double-v prefix, skip deprecated ping_uuids in diff

- Remove extra "v" prefix from ControllerVersion display (was "vv0.21.1")
- Add monitoring.ping_uuids.* to volatile keys — skipped in config diff
- Update manifest to v0.3.3

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

hub/internal/web/configs.go

@@ -738,9 +738,14 @@ func extractControllerYAML(infraData []byte) string {
 	return string(data)
 }
 
-// volatileKeys are YAML keys ignored during config comparison (always differ).
+// volatileKeys are YAML keys ignored during config comparison (always differ or deprecated).
 var volatileKeys = map[string]bool{
-	"web.session_secret": true,
+	"web.session_secret":                    true,
+	"monitoring.ping_uuids.heartbeat":       true,
+	"monitoring.ping_uuids.system_health":   true,
+	"monitoring.ping_uuids.db_dump":         true,
+	"monitoring.ping_uuids.backup":          true,
+	"monitoring.ping_uuids.backup_integrity": true,
 }
 
 // sensitiveKeyParts are substrings that indicate a value should be masked in diff output.