fix(memory): return 200 with null data when memory key not found on GET (#4421)

* fix(memory): return 200 with null data when memory key not found on GET

* test(memory): add null-data path test for memory_get transformResponse

apps/sim/app/api/memory/[id]/route.ts

@@ -86,7 +86,7 @@ export const GET = withRouteHandler(async (request: NextRequest, context: Memory
       .limit(1)
 
     if (memories.length === 0) {
-      return memoryEnvelopeError('Memory not found', 404)
+      return NextResponse.json({ success: true, data: null }, { status: 200 })
     }
 
     const mem = memories[0]

apps/sim/tools/memory/get.test.ts

@@ -36,6 +36,20 @@ describe('memoryGetTool', () => {
     expect(url).toBe('/api/memory/team%2Fuser%20123?workspaceId=workspace-1')
   })
 
+  it('returns empty memories when key is not found (null data)', async () => {
+    const result = await transformResponse(
+      new Response(JSON.stringify({ success: true, data: null }))
+    )
+
+    expect(result).toEqual({
+      success: true,
+      output: {
+        memories: [],
+        message: 'No memories found',
+      },
+    })
+  })
+
   it('wraps the exact memory response as a single result', async () => {
     const result = await transformResponse(
       new Response(