Fix permanent drift in databricks_model_serving when using plaintext credentials
          #5125
        
          
      
      
        
          +412
        
        
          −1
        
        
          
        
      
    
  
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Changes
The GET API for serving endpoints does not return sensitive *_plaintext credential fields for external models (e.g., openai_api_key_plaintext, google_service_account_key_plaintext). This causes Terraform to detect drift even when no actual changes have been made.
Changes:
The solution is generic and will automatically handle new external model providers and their plaintext credential fields without code changes.
Fixes #5074
Tests
make testrun locallydocs/folderinternal/acceptanceNEXT_CHANGELOG.mdfile