openapi: add type enum to Workspace schema (cutover follow-up)

Cloud's Workspace runtime shape includes a 'type' field with enum
[personal, team] that vendor's Workspace was missing. Cloud handlers
reference the generated ingest.WorkspaceType Go enum.

Same kind of surgical addition as JobEntry.status / BillingStatus /
JobDetailResponse.status in this PR — adds cloud-runtime field to
existing vendor schema.

openapi.yaml

@@ -9662,6 +9662,12 @@ components:
           type: string
         name:
           type: string
+        type:
+          type: string
+          enum:
+            - personal
+            - team
+          description: Workspace type (personal vs. team).
         owner_id:
           type: string
         member_count: