Serve images from R2 via files.iddaai.com

Add IMAGE_BASE_URL to the deploy env so the backend builds image URLs
against the Cloudflare image-proxy Worker instead of mackolik, and check
in the Worker source (already live on files.iddaai.com).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -46,6 +46,7 @@ jobs:
             -e AI_ENGINE_URL='http://iddaai-ai-engine:8000' \
             -e JWT_SECRET='${{ secrets.JWT_SECRET }}' \
             -e JWT_ACCESS_EXPIRATION='1d' \
+            -e IMAGE_BASE_URL='https://files.iddaai.com' \
             iddaai-be:latest /bin/sh -c "npx prisma migrate deploy && node dist/src/main.js"
 
       - name: Saglik Kontrolu