After saving and closing the completed training mbconfig file, the mbconfig file only kept the top 5 running history.

**System Information (please complete the following information):**
Windows OS: Windows-11-Enterprise-21H2
ML.Net Model Builder 2019&2022: 16.13.9.2240801(Main Build)
Microsoft Visual Studio Enterprise: 2019(16.11.17); 2022(17.2.6)
**.Net: 6.0,8.0**

**Describe the bug**
- On which step of the process did you run into an issue:
After saving and closing the completed training mbconfig file, the mbconfig file only kept the top 5 running history.

**TestMatrix**
https://testpass.blob.core.windows.net/test-pass-data/wikipedia-detox-250-line-data.tsv

**To Reproduce**
Steps to reproduce the behavior:

1. Select Create a new project from the Visual Studio start window;
2. Choose the C# Console App (**.NET Core**) project template;
3. Add model builder by right click on the project;
4. Select **Data classification or Value predication** scenario>Local (CPU);
5. On Data page, input the data source, then complete training.
6. Save and close the mbconfig file.
9. Re-open the mbconfig file, go back to Train page, you will see only kept the top 5 running history.

**Expected behavior**
After saving and closing the completed training mbconfig file, the mbconfig file should kept all running history.

**Screenshots:**

**Additional context:**

Riproduci il problema completando l’addestramento nel file mbconfig, salvandolo e chiudendolo, quindi riaprendolo e tornando alla pagina Train. Traccia come viene mantenuta e caricata la cronologia dell’addestramento completato; il lavoro è considerato completato quando, riaprendo il file, viene mostrata tutta la cronologia delle esecuzioni invece delle sole prime cinque.

Scritto dal modello di indicizzazione a partire dal testo della issue.