fix: add us-west-2 to Nova supported regions (#5782)

* fix: add us-west-2 to Nova supported regions in finetune_utils

* test: update nova region test to reflect us-west-2 support

Author: pilgd-aws

sagemaker-train/src/sagemaker/train/common_utils/finetune_utils.py

@@ -21,7 +21,7 @@
 
 # Region mappings for model availability
 OPEN_WEIGHTS_REGIONS = ['us-east-1', 'us-west-2', 'ap-northeast-1', 'eu-west-1']  # IAD, PDX, NRT, DUB
-NOVA_REGIONS = ['us-east-1']  # IAD only
+NOVA_REGIONS = ['us-east-1', 'us-west-2']  # IAD, PDX
 # Constants
 DEFAULT_REGION = "us-west-2"
 

sagemaker-train/tests/unit/train/common_utils/test_finetune_utils.py

@@ -488,11 +488,12 @@ def test__validate_model_region_availability_nova_valid_region(self):
         """Test Nova model validation passes for valid region"""
         # Should not raise any exception
         _validate_model_region_availability("nova-textgeneration-lite-v2", "us-east-1")
+        _validate_model_region_availability("nova-textgeneration-lite-v2", "us-west-2")
 
     def test__validate_model_region_availability_nova_invalid_region(self):
         """Test Nova model validation fails for invalid region"""
-        with pytest.raises(ValueError, match="Region 'us-west-2' does not support model customization"):
-            _validate_model_region_availability("nova-textgeneration-lite-v2", "us-west-2")
+        with pytest.raises(ValueError, match="Region 'eu-west-1' does not support model customization"):
+            _validate_model_region_availability("nova-textgeneration-lite-v2", "eu-west-1")
 
     def test__validate_model_region_availability_open_weights_valid_region(self):
         """Test open weights model validation passes for valid region"""