Add GIF regeneration and diagnostic scripts

Added utility scripts for GIF management:

1. regenerate-all-gifs.ts:
   - Regenerates GIF previews for all existing videos
   - Deletes old GIFs before creating new ones
   - Provides progress feedback and summary statistics
   - Useful for bulk GIF generation after deployment

2. check-gifs.ts:
   - Quick diagnostic to list all GIF records in database
   - Shows term names and GIF URLs
   - Useful for verifying GIF generation

3. insert-gif-test.ts:
   - Test script to verify GIF enum value works in database
   - Creates, verifies, and cleans up test GIF record
   - Includes Prisma query logging for debugging

Usage:
  cd packages/backend
  npx tsx scripts/regenerate-all-gifs.ts
  npx tsx scripts/check-gifs.ts
  npx tsx scripts/insert-gif-test.ts

Co-Authored-By: Auggie

packages/backend/scripts/insert-gif-test.ts

@@ -0,0 +1,53 @@
+import { PrismaClient, MediaKind } from '@prisma/client';
+
+const prisma = new PrismaClient({
+  log: ['query', 'info', 'warn', 'error'],
+});
+
+async function testInsert() {
+  console.log('Testing GIF insert...\n');
+
+  try {
+    // Get first video
+    const video = await prisma.termMedia.findFirst({
+      where: { kind: MediaKind.VIDEO },
+    });
+
+    if (!video) {
+      console.log('No video found');
+      return;
+    }
+
+    console.log(`Found video: ${video.url}`);
+    console.log(`Term ID: ${video.termId}\n`);
+
+    // Try to insert GIF
+    const gif = await prisma.termMedia.create({
+      data: {
+        termId: video.termId,
+        kind: MediaKind.GIF,
+        url: '/uploads/gifs/test.gif',
+      },
+    });
+
+    console.log('✅ GIF created:', gif);
+
+    // Verify it exists
+    const check = await prisma.termMedia.findUnique({
+      where: { id: gif.id },
+    });
+
+    console.log('\n✅ Verification:', check);
+
+    // Clean up
+    await prisma.termMedia.delete({ where: { id: gif.id } });
+    console.log('\n✅ Cleaned up test record');
+  } catch (error) {
+    console.error('❌ Error:', error);
+  } finally {
+    await prisma.$disconnect();
+  }
+}
+
+testInsert();
+