chore: import upstream snapshot with attribution

apps/sim/app/api/workspaces/[id]/background-work/route.ts

@@ -0,0 +1,43 @@
+import { db } from '@sim/db'
+import { type NextRequest, NextResponse } from 'next/server'
+import { getWorkspaceBackgroundWorkContract } from '@/lib/api/contracts/workspace-fork'
+import { parseRequest } from '@/lib/api/server'
+import { getSession } from '@/lib/auth'
+import { withRouteHandler } from '@/lib/core/utils/with-route-handler'
+import { listSurfacedBackgroundWork } from '@/ee/workspace-forking/lib/background-work/store'
+import { assertWorkspaceAdminAccess } from '@/ee/workspace-forking/lib/lineage/authz'
+
+export const GET = withRouteHandler(
+  async (req: NextRequest, context: { params: Promise<{ id: string }> }) => {
+    const session = await getSession()
+    if (!session?.user?.id) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
+    }
+
+    const parsed = await parseRequest(getWorkspaceBackgroundWorkContract, req, context)
+    if (!parsed.success) return parsed.response
+    const { id } = parsed.data.params
+    const { cursor, limit } = parsed.data.query
+
+    // The fork Activity feed is a fork feature: gate it behind the same forking-enabled +
+    // workspace-admin check the other fork routes use, instead of a bare access check.
+    await assertWorkspaceAdminAccess(id, session.user.id)
+
+    const { rows, nextCursor } = await listSurfacedBackgroundWork(db, id, { cursor, limit })
+    return NextResponse.json({
+      items: rows.map((row) => ({
+        id: row.id,
+        workspaceId: row.workspaceId,
+        workflowId: row.workflowId,
+        kind: row.kind,
+        status: row.status,
+        message: row.message,
+        error: row.error,
+        metadata: row.metadata ?? null,
+        startedAt: row.startedAt.toISOString(),
+        completedAt: row.completedAt ? row.completedAt.toISOString() : null,
+      })),
+      nextCursor,
+    })
+  }
+)