Add CMTS upstream OFDMA pre equalization Postman requests

- add ServingGroup Upstream OFDMA PreEqualization folder with StartCapture Status Cancel Results
- use ofdma_preeq_cmts_operation_id collection variable from StartCapture response
- wire Results visualizer script to matching upstream OFDMA pre equalization basic html visual
- validate collection to visual mapping with sync visualizers check with no drift and no missing html - 2026-02-28 13:23:58

Author: mgarcia01752