I-ALiRT - added api feature

[laspsandoval]

This pull request refactors the ialirt_packets_query_api Lambda handler to support two mutually exclusive query modes for packet file retrieval: a UTC range mode using strict ISO 8601 timestamps, and an individual parameters mode using year, day-of-year, and optional time components. It also introduces comprehensive error handling for invalid or mixed query modes, and adds/updates tests to cover these scenarios.

Query API enhancements

• Added support for two mutually exclusive query modes: UTC range mode (time_utc_start, time_utc_end) and individual params mode (year, doy, hh, mm, ss). Each mode builds the S3 prefix differently and applies appropriate time filtering.
• Implemented error handling for mixed usage of query modes, missing required parameters, invalid date formats, and cases where the end time is before the start time. [1] [2]

Lambda handler improvements

• Refactored the Lambda handler to use .get() for query parameters, handle missing keys gracefully, and apply post-filtering of files by exact time range when using UTC mode. [1] [2]
• Updated filename parsing and filtering logic to support the new modes and ensure only the correct files are returned for each query type.

Testing updates

• Added new tests to cover UTC range queries, individual param queries, error cases (invalid formats, missing params, mixed modes), and updated existing tests to match the new filename format.