Data storage (#3)

* feat: add prisma

* fix: generate prisma

utils/db.ts

@@ -0,0 +1,44 @@
+import { PrismaClient } from '@prisma/client';
+
+declare global {
+  var prisma: PrismaClient | undefined;
+}
+
+const db = global.prisma || new PrismaClient();
+
+if (process.env.NODE_ENV === 'development') {
+  global.prisma = db;
+}
+
+export const dbOperations = {
+  async saveAnthropicQuery({
+    question,
+    response,
+    success,
+    errorMessage,
+    tokensUsed
+  }: {
+    question: string;
+    response: string;
+    success: boolean;
+    errorMessage?: string;
+    tokensUsed?: number;
+  }) {
+    try {
+      return await db.anthropicQuery.create({
+        data: {
+          question,
+          response,
+          success,
+          errorMessage,
+          tokensUsed
+        }
+      });
+    } catch (error) {
+      console.error('Failed to save query:', error);
+      return null;
+    }
+  }
+};
+
+export { db };