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/check-gifs.ts

@@ -0,0 +1,20 @@
+import { PrismaClient } from '@prisma/client';
+
+const prisma = new PrismaClient();
+
+async function checkGifs() {
+  const gifs = await prisma.termMedia.findMany({
+    where: { kind: 'GIF' },
+    include: { term: true },
+  });
+
+  console.log(`Found ${gifs.length} GIF records in database:`);
+  gifs.forEach(gif => {
+    console.log(`- ${gif.term.wordText}: ${gif.url}`);
+  });
+
+  await prisma.$disconnect();
+}
+
+checkGifs();
+