fix(get_business_term_data,get_column_semantics,get_measure_data)

[MieszkoWasniowski]

fix(get_business_term_data,get_column_semantics,get_measure_data,get_table_semantics): check if asset exists to return proper error code

🎯 What does this PR do?

Adding check if the asset exists before continuing with the tool calls for:

• get_business_term_data
• get_column_semantics
• get_measure_data
• get_table_semantics

✅ Checklist

• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation (if needed).
• My commit messages follow the Conventional Commits standard.