feat: add schemas for veo 3.1

Author: TAnd-dev

docs/api-references/video-models/Google/veo-3.1-first-last-image-to-video-fast.json

@@ -226,4 +226,7 @@ Supported configurations include:
   image_list: {
     desc: `Array of image URLs (2-4 images) for multi-image-to-video generation.`,
   },
+  auto_fix: {
+    desc: `Whether to automatically attempt to fix prompts that fail content policy or other validation checks by rewriting them`,
+  },
 };