dangernoodle-io / TaipanMiner / 27243491656

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fix(mining): drop mining_hw WDT subscription while parked for OTA (c3 pull-OTA task_wdt) (#521)

- root cause: mining_pause_check() blocks in done_take(300000) for the entire OTA
  download+flash (~30-60s) without calling esp_task_wdt_reset(); mining_hw is subscribed
  to the Task WDT via esp_task_wdt_add(NULL) at startup, so the WDT fires citing
  mining_hw (CPU 0) — confirmed on esp32-c3-supermini (single-core, in-place pull-OTA)
- fix (sw-mining / mining.c): gate the blocking mining_pause_check() call on
  mining_pause_pending() and bracket with esp_task_wdt_delete/add/reset so a
  deliberately-idle task is not WDT-monitored during the OTA window; race-free because
  a missed pending() is handled on the next tier-1 cycle (ms later, within 5s ack window)
- fix (asic path / asic_task.c): asic_mining_task also calls mining_pause_check() via
  asic_pause_coalesce_next and blocks in done_take the same way; apply equivalent
  esp_task_wdt_delete/add/reset bracket around both QUIESCE_AND_ACK and ACK_ONLY cases
  so bitaxe pull-OTA is safe too; asic loop resets wdt unconditionally at the top so
  the bracket only needs to cover the blocking done_take window

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

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