Framework updates

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

app/RSpade/Core/Locks/RsxLocks.php

@@ -40,6 +40,7 @@ class RsxLocks
     const LOCK_BUNDLE_BUILD = 'BUNDLE_BUILD';  // Bundle compilation operations
     const LOCK_MIGRATION = 'MIGRATION';  // Database migration operations
     const LOCK_FILE_WRITE = 'FILE_WRITE';  // File upload/storage operations
+    const LOCK_SSR_RENDER = 'SSR_RENDER';  // SSR server lifecycle + render operations
 
     // Site-specific lock prefix (appended with site_id)
     const LOCK_SITE_PREFIX = 'SITE_';  // e.g., SITE_1, SITE_2, etc.