Update privy secret usage

src/Managing.Web3Proxy/src/plugins/custom/privy.ts

@@ -1309,6 +1309,8 @@ export default fp(async (fastify) => {
     fastify.log.warn('App will continue but Privy operations will fail until secrets are configured');
   }
 }, {
-  name: 'privy-plugin'
+  name: 'privy-plugin',
+  // Ensure privy-secrets plugin loads first to populate fastify.privySecrets decorator
+  dependencies: ['privy-secrets']
 });