feat: auto-sync extension registry from Gitea on startup

Every time the server starts (including after deploy), it syncs
the extension registry from Gitea before serving requests.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server.py

@@ -993,8 +993,21 @@ class APIHandler(BaseHTTPRequestHandler):
 
 
 if __name__ == '__main__':
-    # Load modules from DB; fall back to static list if DB unavailable
-    _load_modules_from_db()
+    # Sync extensions from Gitea and load into DB on every startup
+    try:
+        result = sync_extension_registry()
+        if result['status'] == 'ok':
+            changes = result['added'] + result['reactivated'] + result['deactivated']
+            if changes:
+                print(f"[init] Registry synced — added: {result['added']}, reactivated: {result['reactivated']}, deactivated: {result['deactivated']}")
+            else:
+                print(f"[init] Registry synced — no changes ({len(MODULES)} modules)")
+        else:
+            print(f"[init] Registry sync failed: {result.get('message', '')}")
+            _load_modules_from_db()
+    except Exception as e:
+        print(f"[init] Registry sync error: {e}")
+        _load_modules_from_db()
     if not MODULES:
         MODULES.update(_MODULES_FALLBACK)
         print(f"[init] Using static fallback: {len(MODULES)} modules")