Two FW changes closing both Open Items in ADR-108:
1. POST /ota/recalibrate on port 8032 erases csi_cfg/gl_agc, gl_fft,
gl_ap_mac then esp_restart() — operator can force a full re-cal
without USB. Reuses ota_check_auth Bearer-token guard.
2. New csi_cfg/gl_ap_mac (6-byte blob) saved alongside AGC/FFT.
Boot-time short-circuit compares saved BSSID with current
esp_wifi_sta_get_ap_info().bssid; mismatch → discard cache, run
full calibration. All-zero (legacy NVS without MAC) treated as
wildcard so existing deployments don't re-cal on first upgrade.
Verified by OTA-flashing both sensors (192.168.0.100, .101) and
calling /ota/recalibrate via curl — both returned the expected JSON
and came back online ~15 s later running fresh calibration.
Co-Authored-By: claude-flow <ruv@ruv.net>
f92807cdaf