dangernoodle-io / breadboard / 26074960243

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feat(bb_update_check): default worker task to Core 1 (B1-218) (#276)

Default `s_task_core` was `tskNO_AFFINITY`. On dual-core boards without
an ASIC the FreeRTOS scheduler routinely places the worker on Core 0 —
the same core that runs lwip, wifi, httpd, and the consumer's
stratum/control-plane tasks. The mbedTLS handshake the worker performs
is CPU-bound for ~200–600 ms per attempt and does not yield inside its
busy loop; under any heap-pressured retry path (e.g. when SSE clients
shrink the largest free block below the TLS record buffer) it can hold
Core 0 long enough to starve IDLE0 past the task watchdog. Observed on
TaipanMiner tdongle-s3 (TA-376) where the bug surfaced as `task_wdt`
panics 30–70 s into steady-state mining with the dashboard open.

Mirror bb_ota_pull's default (Core 1). Consumers that prefer the older
behavior can opt back in via `bb_update_check_set_task_core(tskNO_AFFINITY)`.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

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