feat(dshot): Extended Telemetry and EEPROM support

Overhauls the DShot driver with per-timer BDShot selection, multi-timer                                                                                                                                  
sequential capture, Extended DShot Telemetry (EDT), and AM32 ESC EEPROM                                                                                                                                  
read/write via MAVLink. Expands ESC support from 8 to 12 channels.                                                                                                                                       
                                                                                                                                                                                                   
BDShot:                                                                                                                                                                                                  
- Per-timer BDShot protocol selection via actuator config UI                                                                                                                                             
- Multi-timer sequential burst/capture on any DMA-capable timer                                                                                                                                          
- Adaptive per-channel GCR bitstream decoding                                                                                                                                                            
- Per-channel online/offline detection with hysteresis                                                                                                                                                   
                                                                                                                                                                                                   
Extended DShot Telemetry (EDT):                                                                                                                                                                          
- Temperature, voltage, current from BDShot frames (no serial wire)                                                                                                                                      
- New DSHOT_BIDIR_EDT parameter                                                                                                                                     
- EDT data merged with serial telemetry when both available                                                                                                                                              
                                                                                                                                                                                                   
AM32 EEPROM:                                                                                                                                                                                             
- Read/write AM32 ESC settings via MAVLink ESC_EEPROM message                                                                                                                                            
- ESCSettingsInterface abstraction for future ESC firmware types                                                                                                                                         
- New DSHOT_ESC_TYPE parameter                                                                                                                                                                           
                                                                                                                                                                                                   
Other changes:                                                                                                                                                                                           
- Per-motor pole count params DSHOT_MOT_POL1–12 (replaces MOT_POLE_COUNT)                                                                                                                              
- EscStatus/EscReport expanded to 12 ESCs with uint16 bitmasks                                                                                                                                           
- Numerous bounds-check, overflow, and concurrency fixes                                                                                                                                                 
- Updated DShot documentation

src/drivers/uavcan/actuators/esc.cpp

@@ -153,9 +153,9 @@ void UavcanEscController::esc_status_extended_sub_cb(const uavcan::ReceivedDataS
 	}
 }
 
-uint8_t UavcanEscController::check_escs_status()
+uint16_t UavcanEscController::check_escs_status()
 {
-	int esc_status_flags = 0;
+	uint16_t esc_status_flags = 0;
 	const hrt_abstime now = hrt_absolute_time();
 
 	for (int index = 0; index < esc_status_s::CONNECTED_ESC_MAX; index++) {

src/drivers/uavcan/actuators/esc.hpp

@@ -99,7 +99,7 @@ private:
 	/**
 	 * Checks all the ESCs freshness based on timestamp, if an ESC exceeds the timeout then is flagged offline.
 	 */
-	uint8_t check_escs_status();
+	uint16_t check_escs_status();
 
 	/**
 	 * Gets failure flags for a specific ESC