feat: add videos table to schema and implement video upload route with metadata persistence

Backend/routes/videos.ts

@@ -1,6 +1,8 @@
 import { Router } from 'express';
 import { z } from 'zod';
 
+import { db } from '../db/client';
+import { videos } from '../db/schema';
 import { requireAuth } from '../middleware/auth';
 import {
   ensureMinioBucket,
@@ -55,6 +57,33 @@ router.post('/upload-url', async (req, res) => {
 
   const objectKey = buildObjectKey(user.userId, parsed.data.fileName, parsed.data.prefix);
   const uploadUrl = await minioClient.presignedPutObject(minioBucket, objectKey, minioPresignedExpirySeconds);
+  const now = new Date();
+  const expiresAt = new Date(now.getTime() + minioPresignedExpirySeconds * 1000);
+
+  const [videoRecord] = await db
+    .insert(videos)
+    .values({
+      userId: user.userId,
+      objectKey,
+      bucket: minioBucket,
+      uploadUrl,
+      status: 'upload_link_sent',
+      expiresAt,
+      updatedAt: now,
+    })
+    .returning({
+      id: videos.id,
+      objectKey: videos.objectKey,
+      bucket: videos.bucket,
+      status: videos.status,
+      createdAt: videos.createdAt,
+      expiresAt: videos.expiresAt,
+    });
+
+  if (!videoRecord) {
+    res.status(500).json({ message: 'Unable to persist video metadata' });
+    return;
+  }
 
   res.status(201).json({
     message: 'Dummy upload URL generated',
@@ -62,6 +91,7 @@ router.post('/upload-url', async (req, res) => {
     objectKey,
     uploadUrl,
     expiresInSeconds: minioPresignedExpirySeconds,
+    video: videoRecord,
   });
 });