Changes sessions to be stored in the DB, this ensures that sessions persist after a restart!

prisma/migrations/20250425115643_add_session_table/migration.sql

@@ -0,0 +1,12 @@
+-- CreateTable
+CREATE TABLE "Session" (
+    "id" TEXT NOT NULL,
+    "sid" TEXT NOT NULL,
+    "data" TEXT NOT NULL,
+    "expires_at" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "Session_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "Session_sid_key" ON "Session"("sid");

prisma/schema.prisma

@@ -121,3 +121,11 @@ model ChatMessage {
   createdAt DateTime   @default(now()) @map("created_at")
   thread    ChatThread @relation(fields: [threadId], references: [id], onDelete: Cascade)
 }
+
+// Add this model for session storage
+model Session {
+  id        String   @id
+  sid       String   @unique
+  data      String
+  expiresAt DateTime @map("expires_at")
+}