Replace misleading second ID test with int64 AutoField test

Agent-Logs-Url: https://github.com/fsprojects/FSharp.Data.GraphQL/sessions/665410b5-82a2-4766-8ae5-0fd2f16a121e

Co-authored-by: xperiandri <2365592+xperiandri@users.noreply.github.com>

Author: Copilot

tests/FSharp.Data.GraphQL.Tests/ExecutionTests.fs

@@ -608,13 +608,17 @@ type PersonWithGuidId =
     { Id: Guid
       Name: string }
 
+type PersonWithInt64Id =
+    { Id: int64
+      Name: string }
+
 [<Fact>]
 let ``Execution handles ID scalar: serializes Guid field via AutoField`` () =
     let id1 = Guid.Parse "d6c684d9-aaaa-4e88-bbb2-0bb584f1661d"
     let id2 = Guid.Parse "d6c684d9-bbbb-4e88-bbb2-0bb584f1661d"
     let people =
-        [ { Id = id1; Name = "Person A" }
-          { Id = id2; Name = "Person B" } ]
+        [ { PersonWithGuidId.Id = id1; Name = "Person A" }
+          { PersonWithGuidId.Id = id2; Name = "Person B" } ]
 
     let PersonType =
         Define.Object<PersonWithGuidId>(
@@ -642,17 +646,15 @@ let ``Execution handles ID scalar: serializes Guid field via AutoField`` () =
         data |> equals (upcast expected)
 
 [<Fact>]
-let ``Execution handles ID scalar: serializes Guid field via explicit Field resolve`` () =
-    let id1 = Guid.Parse "d6c684d9-aaaa-4e88-bbb2-0bb584f1661d"
-    let id2 = Guid.Parse "d6c684d9-bbbb-4e88-bbb2-0bb584f1661d"
+let ``Execution handles ID scalar: serializes int64 field via AutoField`` () =
     let people =
-        [ { Id = id1; Name = "Person A" }
-          { Id = id2; Name = "Person B" } ]
+        [ { PersonWithInt64Id.Id = 1L; Name = "Person A" }
+          { PersonWithInt64Id.Id = 2L; Name = "Person B" } ]
 
     let PersonType =
-        Define.Object<PersonWithGuidId>(
-            "Person",
-            [ Define.Field("id", IDType, fun _ (p : PersonWithGuidId) -> string p.Id)
+        Define.Object<PersonWithInt64Id>(
+            "Person2",
+            [ Define.AutoField("id", IDType)
               Define.AutoField("name", StringType) ])
 
     let QueryRoot =
@@ -666,8 +668,8 @@ let ``Execution handles ID scalar: serializes Guid field via explicit Field reso
     let expected =
         NameValueLookup.ofList [
             "people", upcast [
-                box <| NameValueLookup.ofList [ "id", box (string id1); "name", box "Person A" ]
-                box <| NameValueLookup.ofList [ "id", box (string id2); "name", box "Person B" ]
+                box <| NameValueLookup.ofList [ "id", box "1"; "name", box "Person A" ]
+                box <| NameValueLookup.ofList [ "id", box "2"; "name", box "Person B" ]
             ]
         ]
     ensureDirect result <| fun data errors ->