Boot-Looping Watch & Bike-Computer System .FIT Surgeon (Totals, Settings, Records & Waypoints Rescue)

Deterministic ANT+ FIT system-file message schema validator (device_settings, user_profile, totals, locations, personal_records) + out-of-bounds enum/UTF-8 string sanitizer & reflected CRC-16 recalculator engine (.fit) built for Garmin Fenix / Epix / Forerunner, Garmin Edge, Garmin Montana / GPSMAP, Wahoo — zero-upload ephemeral Wasm RAM execution.