Introduces exponential backoff and Retry-After header handling for embedding API rate limits in both processors and search service. Adds CI fixture to mock OpenAI embeddings, avoiding real API calls during tests. Updates Makefile to document and set MOCK_EMBEDDINGS for integration and CI test targets.
This commit updates the SearchService class to utilize the `get` method for safely accessing fields in the search results. This change enhances the robustness of the code by preventing potential KeyErrors and aligns with best practices for building maintainable async code. Additionally, it simplifies the data extraction process from the search results, improving overall code clarity.
