fix(cursor): restore base64 file data in legacy download_artifact metadata

The legacy CursorBlock exposes only content + metadata (no v2 file
output), so metadata.data was the only way legacy-block workflows could
access downloaded artifact bytes. Restore the base64 data field and
document it in the outputs/type instead of dropping it.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: waleedlatif1

apps/sim/tools/cursor/download_artifact.ts

@@ -62,6 +62,7 @@ export const downloadArtifactTool: ToolConfig<DownloadArtifactParams, DownloadAr
         metadata: {
           name: data.output.file.name,
           mimeType: data.output.file.mimeType,
+          data: data.output.file.data,
           size: data.output.file.size,
         },
       },
@@ -76,6 +77,7 @@ export const downloadArtifactTool: ToolConfig<DownloadArtifactParams, DownloadAr
       properties: {
         name: { type: 'string', description: 'File name' },
         mimeType: { type: 'string', description: 'MIME type' },
+        data: { type: 'string', description: 'Base64-encoded file contents' },
         size: { type: 'number', description: 'File size in bytes' },
       },
     },

apps/sim/tools/cursor/types.ts

@@ -210,6 +210,7 @@ export interface DownloadArtifactResponse extends ToolResponse {
     metadata: {
       name: string
       mimeType: string
+      data: string
       size: number
     }
   }