docs: Update project docs with ALERT command and v1.11 completion

TODO.md

@@ -2,20 +2,13 @@
 
 ## Firmware
 
-### Commands
-- [ ] PING command (echo reply for connectivity tests)
-- [ ] LOG command (runtime `esp_log_level_set()` control)
-- [ ] RSSI RESET command (reset min/max counters)
-
 ### Features
 - [ ] Multi-target (send UDP data to 2+ destinations simultaneously)
-- [ ] Temp/heap alert thresholds (emit EVENT on overheat or low memory)
 - [ ] Deep sleep mode with wake-on-CSI-motion
 - [ ] Battery-optimized duty cycling
 - [ ] AP+STA config portal (captive portal for initial setup)
 
 ### Testing
-- [ ] OTA rollback validation (flash bad firmware, verify auto-revert)
 - [ ] Tune presence threshold per room with real-world testing
 - [ ] Power consumption measurements (per-mode: idle, CSI, BLE, probe)
 - [ ] Benchmark: CSI callback latency