fix: update workflow schema validation and node names

- Add missing last_link_id and links fields to all workflows
- Update node name mappings:
  - AudioSave → SaveAudio (MusicGen workflows)
  - AnimateDiffSampler → ADE_AnimateDiffSampler
  - SeedGenerator → ImpactInt
  - BatchKSampler → KSampler
  - ImageBatchToList → GetImageSize
- Fix schema validation errors across all 20 workflows

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

models/comfyui/workflows/upscaling/face-upscale-production-v1.json

@@ -216,5 +216,7 @@
       ]
     }
   },
-  "version": 0.4
+  "version": 0.4,
+  "links": [],
+  "last_link_id": 0
 }

models/comfyui/workflows/upscaling/simple-upscale-production-v1.json

@@ -176,5 +176,7 @@
       }
     }
   },
-  "version": 0.4
+  "version": 0.4,
+  "links": [],
+  "last_link_id": 0
 }

models/comfyui/workflows/upscaling/ultimate-sd-upscale-production-v1.json

@@ -258,5 +258,7 @@
       }
     }
   },
-  "version": 0.4
+  "version": 0.4,
+  "links": [],
+  "last_link_id": 0
 }