stolen from Zephyr main:
1. Issue StopTimerOnPreamble=1 before SetRxDutyCycle so the chip's
timer is not reset on every preamble detect (per §13.1 of the
datasheet). Without this, duty cycle effectively never sleeps in
noisy RF and current draw spikes.
2. On IRQ_RX_TX_TIMEOUT during duty-cycle RX, re-arm via
sx126x_restart_rx() instead of falling through to set_sleep().
The old path silently killed duty cycle after the first preamble
false-positive.
3. On recv_duty_cycle(NULL) cancel, wake the radio before issuing
SetStandby — BUSY stays asserted during the sleep phase and the
standby command was being dropped.
Also adds a dc_timeout_restarts atomic counter incremented on the Fix 2
path, exposed end-to-end: sx126x_ext.h accessors → LoRaRadioBase vtable
→ SX126xRadio override → CommonCLICallbacks → RepeaterMesh. Query via
`get dc.restarts` on the repeater CLI; cleared by `clear stats`. High
values indicate a noisy environment or a too-loose preamble threshold.
(+increase ESP BT stack because future zephyr pin advance will trip that mine)
- RegionMap::findMatch(): fix 1-byte stack overflow in tmp[] with bounded memcpy
- Packet::readFrom(): add bounds checks before reading transport codes
- Mesh::sendFlood(): release packet on TRACE type and invalid hash_size early returns
- CompanionMesh: add cleanupSignState() called from BLE disconnect to free sign buffer
- ZephyrCompanionUSB: add 2s timeout for partial V3 frames to prevent parser stall
- ui_mesh_actions: replace volatile bool with Zephyr atomic_t for cross-thread state
- CommonCLI: wrap ~40 fs_read() calls in prefs_read() helper with truncation warning
liquidraver