Replaced direct return of `last_event` with an explicit construction of `SampleEventResponse`. This ensures clarity and better adherence to the response schema.
Introduced `/samples/{sample_id}/upload-images` API for uploading images tied to samples, validating file types, and saving them in structured directories. Fixed `puck_location_in_dewar` type handling in puck routes. Updated project version in `pyproject.toml`.
Reorganized and enhanced the OpenAPI fetch logic for better maintainability and error handling. Key updates include improved environment variable validation, more detailed error messages, streamlined configuration loading, and additional safety checks for file paths and directories. Added proper logging and ensured the process flow is easy to trace.
