dangernoodle-io / breadboard / 27243047684

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feat(bb_ota): make OTA retry/timeout constants Kconfig knobs (#376)

Expose the previously hardcoded pull/push OTA operational constants as
Kconfig int knobs (defaults unchanged), so deployments can tune OTA
robustness per network/board without code changes.

bb_ota_pull:
- BB_OTA_PULL_HTTP_TIMEOUT_MS (20000) — per-recv download timeout default
  (runtime bb_ota_pull_set_http_timeout_ms still overrides); host build
  keeps 20000 via an #ifndef fallback
- BB_OTA_PULL_DL_MAX_ATTEMPTS (3) — download retry count
- BB_OTA_PULL_DL_BACKOFF_BASE_MS (3000) + _MAX_MS (20000) — exponential
  retry backoff min(base<<attempt, max), replacing the fixed
  {3000,10000,20000} array
- BB_OTA_PULL_STALL_WARN_S (10) — no-bytes stall-warning interval

bb_ota_push:
- BB_OTA_PUSH_RECV_TIMEOUT_RETRIES (30) — recv-timeout retries before abort

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

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