GLOWS - bugfix

[laspsandoval]

This pull request improves the robustness of the GLOWS L1A data processing pipeline and enhances test coverage, particularly for handling packets with missing or insufficient direct event data. The changes include stricter filtering of incomplete records, improved logging and debugging output, the addition of new test data and fixtures, and a new test case for empty direct event packets.

Improvements to GLOWS L1A data handling:

• The filter for DE records now excludes records with empty direct_events lists, not just None, ensuring only complete records are processed.
• In _generate_direct_events, added a check for insufficient direct event data (<8 bytes), with logging and early return to prevent errors and aid debugging.

Test data and coverage enhancements:

• Added a new test data file (imap_glows_l0_raw_20260202-repoint00145_v001.pkts) to the external test data configuration for more comprehensive validation.
• Introduced a new pytest fixture repoint_packet_path to provide access to the new test data file.
• Added a test case test_glows_l1a_empty_de_packet to verify that L1A processing correctly handles packets with no direct event data.