feat: Implement session processing and refresh schedulers

- Added processingScheduler.js and processingScheduler.ts to handle session transcript processing using OpenAI API.
- Implemented a new scheduler (scheduler.js and schedulers.ts) for refreshing sessions every 15 minutes.
- Updated Prisma migrations to add new fields for processed sessions, including questions, sentimentCategory, and summary.
- Created scripts (process_sessions.mjs and process_sessions.ts) for manual processing of unprocessed sessions.
- Enhanced server.js and server.mjs to initialize schedulers on server start.

lib/schedulers.ts

@@ -0,0 +1,18 @@
+// Combined scheduler initialization
+import { startScheduler } from "./scheduler";
+import { startProcessingScheduler } from "./processingScheduler";
+
+/**
+ * Initialize all schedulers
+ * - Session refresh scheduler (runs every 15 minutes)
+ * - Session processing scheduler (runs every hour)
+ */
+export function initializeSchedulers() {
+  // Start the session refresh scheduler
+  startScheduler();
+  
+  // Start the session processing scheduler
+  startProcessingScheduler();
+  
+  console.log("All schedulers initialized successfully");
+}