Send ESP-NOW accel only on deadzone change and harden BLE+WiFi OTA coex.

Quiet pods no longer spam 100 Hz samples; mute wifi logs and throttle BLE
notifies during slave distribution so the wifi task stack does not panic.

Co-authored-by: Cursor <cursoragent@cursor.com>

main/ble_host.c

@@ -3,6 +3,7 @@
 #include "esp_timer.h"
 #include "host_transport.h"
 #include "nvs_flash.h"
+#include "ota_espnow.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/semphr.h"
 #include "freertos/task.h"
@@ -26,9 +27,12 @@ static const char *DEVICE_NAME = "Powerpod";
 /** Prefer large ATT MTU so CLIENT_INFO / BATTERY fit in fewer notify chunks. */
 #define BLE_PREFERRED_ATT_MTU 517
 #define BLE_NOTIFY_CHUNK_RETRIES 24
+/** During ESP-NOW OTA dist, fail notify sooner so WiFi/ESP-NOW keeps airtime. */
+#define BLE_NOTIFY_CHUNK_RETRIES_OTA_DIST 4
 #define BLE_NOTIFY_CHUNK_RETRY_MS 5
 /** Pace multi-chunk notifies so the central parser sees contiguous frame bytes. */
 #define BLE_NOTIFY_CHUNK_GAP_MS 8
+#define BLE_NOTIFY_CHUNK_GAP_OTA_DIST_MS 2
 
 /*
  * Nordic UART style:
@@ -73,7 +77,10 @@ uint16_t ble_host_max_payload(void) {
  * One ATT notification (≤ MTU-3). Retries on transient NimBLE buffer pressure.
  */
 static esp_err_t ble_notify_chunk(const uint8_t *data, uint16_t len) {
-  for (int attempt = 0; attempt < BLE_NOTIFY_CHUNK_RETRIES; attempt++) {
+  const int max_retries = ota_espnow_distribution_active()
+                              ? BLE_NOTIFY_CHUNK_RETRIES_OTA_DIST
+                              : BLE_NOTIFY_CHUNK_RETRIES;
+  for (int attempt = 0; attempt < max_retries; attempt++) {
     struct os_mbuf *om = ble_hs_mbuf_from_flat(data, len);
     if (om == NULL) {
       vTaskDelay(pdMS_TO_TICKS(BLE_NOTIFY_CHUNK_RETRY_MS));
@@ -140,7 +147,10 @@ static esp_err_t ble_host_tx(const uint8_t *frame, size_t frame_len) {
     }
     off += n;
     if (off < frame_len) {
-      vTaskDelay(pdMS_TO_TICKS(BLE_NOTIFY_CHUNK_GAP_MS));
+      const uint32_t gap_ms = ota_espnow_distribution_active()
+                                 ? BLE_NOTIFY_CHUNK_GAP_OTA_DIST_MS
+                                 : BLE_NOTIFY_CHUNK_GAP_MS;
+      vTaskDelay(pdMS_TO_TICKS(gap_ms));
     }
   }