No validation for model name field - allows empty string

[Vasanthakumar-murugan]

Issue:

ModelSettings.name has no validation and defaults to "" (empty string), allowing models to be registered without a name.

Location:
mlserver/settings.py, line 424
name: str = ""

Problem:

• Models are being loaded with empty names when MLSERVER_MODEL_NAME is not set
• Logs show: INFO - Loaded model '' successfully (mlserver/registry.py, line 169)
• Models are inaccessible via API endpoints

Expected:

• Name should be required
• Raise validation error if not provided or empty