Prevent nonce reuse after reboots by persisting per-peer nonce counters
to a dedicated /nonces (companion) or /s_nonces (server) file. On dirty
reset (power-on, watchdog, brownout), nonces are bumped by NONCE_BOOT_BUMP
(100) to cover any unpersisted messages. Clean wakes (deep sleep, software
restart) load nonces as-is.
- Add nonce persistence to BaseChatMesh (companion) and ClientACL (server)
- Add wasDirtyReset() helper to ArduinoHelpers.h for platform-specific
reset reason detection (ESP32/NRF52)
- Add onBeforeReboot() callback to CommonCLI for pre-reboot nonce flush
- Wire nonce persistence into all firmware variants: companion radio,
repeater, room server, and sensor
- Only clear dirty flag on successful file write
Wessel Nieboer
9ce710ebd1