refactor: replace rich console with standard logging and improve api …

[uday-codes69]

Overview
This PR improves the logging and error handling within the

ModuleLLM
class to better align with Python library best practices.

Key Changes
Replaced rich.console with logging: Switched from using rich.console.Console for warnings to the standard Python logging module. This allows integrators to manage log levels and outputs through standard configuration.
Enhanced API Key Error Messages: Updated the ValueError raised when a provider's API key is missing. The error now explicitly states the required environment variable name (e.g., OPENAI_API_KEY) and suggests a fix (e.g., "set it in your .env file").
Cleaned up Warning Strings: Standardized the formatting of warning logs to use parameter injection instead of f-strings, consistent with logging standards.

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[uday-codes69]

@wang-boyu Sir can you check this?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.33%. Comparing base (379c4d8) to head (9d5db03).
⚠️ Report is 26 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #85      +/-   ##
==========================================
+ Coverage   87.61%   88.33%   +0.71%     
==========================================
  Files          19       19              
  Lines        1405     1423      +18     
==========================================
+ Hits         1231     1257      +26     
+ Misses        174      166       -8     

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[wang-boyu]

Thanks. LGTM. Merging now.