dangernoodle-io / breadboard / 26788636886

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feat(bb_ota_pull): make pull-OTA complete on single-core boards (#327)

single-core no-PSRAM targets (esp32-s2, esp32-c3) run the consumer's
mining task and the OTA-pull worker on the same core. the sustained TLS
download starved the idle task (task_wdt) and the un-drained socket
ballooned the heap. validated on-device: a full github pull-OTA on the
esp32-c3 now downloads, reboots clean, and marks valid.

- yield once per esp_https_ota_perform chunk (vTaskDelay(1)) so the idle
  task and lwIP get the core during the download loop.
- add bb_ota_pull_set_task_priority so consumers can raise the worker
  above a CPU-bound mining task; otherwise it never preempts to call the
  pause hook (mirrors bb_update_check_set_task_priority).
- retry the whole download (re-begin) on a transient mid-download read
  error instead of failing the OTA — only the handshake was retried
  before. adds a host-tested bb_ota_pull_download_should_retry helper.
- extract the byte-identical task-WDT reconfigure helper shared by
  bb_ota_push and bb_ota_pull into bb_system_wdt_set_timeout (single
  source; preserves the idle-core mask and panic-on-timeout policy).

host tests green (1125); esp32 + esp32c3 smoke link clean.

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

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