feat: add workflowRendererVersion workflow schema (#7086)

## Summary

add workflowRendererVersion to workflow schema extra

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7086-feat-add-workflowRendererVersion-workflow-schema-2bd6d73d3650818dbcecf2b85b0553a2)
by [Unito](https://www.unito.io)

src/platform/workflow/validation/schemas/workflowSchema.ts

@@ -1,6 +1,9 @@
 import { z } from 'zod'
 import type { SafeParseReturnType } from 'zod'
 import { fromZodError } from 'zod-validation-error'
+import type { RendererType } from '@/lib/litegraph/src/LGraph'
+
+const zRendererType = z.enum(['LG', 'Vue']) satisfies z.ZodType<RendererType>
 
 // GroupNode is hacking node id to be a string, so we need to allow that.
 // innerNode.id = `${this.node.id}:${i}`
@@ -271,7 +274,8 @@ const zExtra = z
     ds: zDS.optional(),
     frontendVersion: z.string().optional(),
     linkExtensions: z.array(zComfyLinkExtension).optional(),
-    reroutes: z.array(zReroute).optional()
+    reroutes: z.array(zReroute).optional(),
+    workflowRendererVersion: zRendererType.optional()
   })
   .passthrough()