FlockMTL v0.4.0

[anasdorbani]

This PR closes #178 and introduces two main updates to the API:

1. Payload structure update

   • Changed the request body from:

     {'model_name': 'summarizer', 'secret_name': 'summarizer_secret'},
     {'prompt_name': 'description-generation', 'version': 1},
     {'product_name': product_name}

     to:

     {'model_name': 'summarizer', 'secret_name': 'summarizer_secret'},
     {'prompt_name': 'description-generation', 'version': 1, 'context_columns': [{'data': product_name}]}

   • This aligns the input format with the new API contract by wrapping product_name inside context_columns.

2. Functions now support images as inputs alongside text.

3. Bug fixes and reliability improvements:

   • Fixed errors caused by missing or malformed input values.

   • Improved error handling and validation to reduce runtime failures.