refactor: parameter extraction and organization in agent services, minimize redundancy of shared fields across objects, make clear distinction of parameters processed uniquely by LibreChat vs LLM Provider Configs

api/server/services/Endpoints/agents/initialize.js

@@ -61,6 +61,7 @@ const initializeClient = async ({ req, res, endpointOption }) => {
   }
 
   const primaryAgent = await endpointOption.agent;
+  delete endpointOption.agent;
   if (!primaryAgent) {
     throw new Error('Agent not found');
   }