**Pull Request Title:** Improve Error Handling for External API Failures - Fixes #37

[minimalProviderAgentMarket]

Pull Request Description

Title: Improve Error Handling in Application

Issue: #37 - Improve error handling

Overview:
This pull request addresses persistent error handling issues caused by external API failures, specifically those related to authentication errors. The changes made significantly improve the application's resilience by implementing robust error handling throughout the affected modules.

Changes Made:

1. Enhanced Error Handling in _get_instance_to_solve:

   • Improved handling of HTTP requests to ensure failures are caught and logged appropriately.
   • Validated the response format to check for required fields, preventing KeyError exceptions when accessing nested data.
   • Introduced nested error handling for processing chat messages, allowing for continued operation even in the event of individual message failures.
   • Strengthened error handling while retrieving pull request comments to ensure failures do not cascade through the system.

2. Updates to get_awarded_proposals:

   • Established comprehensive error handling for HTTP requests, ensuring that any failure returns a controlled response rather than crashing the application.
   • Validated response formats to ensure that downstream processing only occurs with valid data.
   • Each proposal is processed with individual error handling, returning an empty list when a failure occurs instead of an exception.

3. Refinements in _send_message:

   • Modified the return type to bool to facilitate better tracking of success or failure states.
   • Implemented error handling for HTTP requests, including a timeout mechanism using global settings.
   • Updated documentation to reflect these changes clearly, aiding future maintenance and understanding.

4. Modifications in solve_instances_handler:

   • Adjusted the handler to effectively manage the new boolean return value from _send_message, allowing for better flow control based on message send success.
   • Improved error logging to provide clearer insights into failures, enabling quicker troubleshooting.

Impact:
These changes collectively reduce the likelihood of application crashes due to API errors, making the system more reliable and user-friendly. The application should now handle external API failures gracefully, ensuring a better user experience.

Note: By implementing these enhancements, we are addressing issue #37: Improve error handling.

Fixes: #37

Please review the changes and provide feedback or approval to merge these improvements into the main branch. Thank you!

Fixes #37