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

Backend/db/schema.ts

@@ -1,4 +1,4 @@
-import { pgTable, timestamp, uuid, varchar } from 'drizzle-orm/pg-core';
+import { pgTable, timestamp, uuid, varchar, text } from 'drizzle-orm/pg-core';
 
 export const users = pgTable('users', {
   id: uuid('id').defaultRandom().primaryKey(),
@@ -14,4 +14,17 @@ export const events = pgTable('events', {
   title: varchar('title', { length: 255 }).notNull(),
   createdAt: timestamp('created_at', { withTimezone: true }).defaultNow().notNull(),
   videoUrl: varchar('video_url', { length: 255 }).notNull().unique(),
-});
+});
+
+export const videos = pgTable('videos', {
+  id: uuid('id').defaultRandom().primaryKey(),
+  userId: uuid('user_id').notNull().references(() => users.id),
+  objectKey: varchar('object_key', { length: 1024 }).notNull().unique(),
+  bucket: varchar('bucket', { length: 255 }).notNull(),
+  uploadUrl: text('upload_url').notNull(),
+  downloadUrl: text('download_url'),
+  status: varchar('status', { length: 32 }).notNull().default('pending'),
+  expiresAt: timestamp('expires_at', { withTimezone: true }),
+  createdAt: timestamp('created_at', { withTimezone: true }).defaultNow().notNull(),
+  updatedAt: timestamp('updated_at', { withTimezone: true }).defaultNow().notNull(),
+});