user 2586234473 feat: Add HMAC command auth, deauth flood detection, sign all tools ...

Firmware:
- HMAC-SHA256 command authentication (AUTH command, NVS persisted)
- Deauth flood detection with ring buffer and aggregate ALERT_DATA
- FLOODTHRESH command (count + window, NVS persisted)
- New STATUS fields: auth=on/off, flood_thresh=5/10
- mbedtls dependency in CMakeLists.txt, rx_buf increased to 192

Tools:
- esp-cmd/esp-fleet/esp-ota import sign_command from esp_ctl.auth
- Commands auto-signed when ESP_CMD_SECRET env var is set

Docs:
- CHEATSHEET: AUTH, FLOODTHRESH, HMAC auth, OUI, watch, osint sections
- TASKS: v1.3 completed section with all new features

2026-02-04 21:07:00 +01:00

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