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/scheduler.js

@@ -0,0 +1,35 @@
+// Session refresh scheduler - JavaScript version
+import cron from "node-cron";
+import { PrismaClient } from "@prisma/client";
+import { fetchAndStoreSessionsForAllCompanies } from "./csvFetcher.js";
+
+const prisma = new PrismaClient();
+
+/**
+ * Refresh sessions for all companies
+ */
+async function refreshSessions() {
+  console.log("[Scheduler] Starting session refresh...");
+  try {
+    await fetchAndStoreSessionsForAllCompanies();
+    console.log("[Scheduler] Session refresh completed successfully.");
+  } catch (error) {
+    console.error("[Scheduler] Error during session refresh:", error);
+  }
+}
+
+/**
+ * Start the session refresh scheduler
+ */
+export function startScheduler() {
+  // Run every 15 minutes
+  cron.schedule("*/15 * * * *", async () => {
+    try {
+      await refreshSessions();
+    } catch (error) {
+      console.error("[Scheduler] Error in scheduler:", error);
+    }
+  });
+
+  console.log("[Scheduler] Started session refresh scheduler (runs every 15 minutes).");
+}