dangernoodle-io / TaipanMiner / 25289970834

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fix: stream /api/knot peer array via bb_http json stream API (TA-299) (#316)

Bumps breadboard to v0.22.0 which provides bb_http_resp_json_arr_begin/emit/end
for streaming JSON arrays. Rewrites knot_handler to use streaming instead of
malloc'ing ~8 KB for the peer array and building the full cJSON tree (~27 KB
transient). Per-request memory now peaks at ~1 KB stack + one small per-peer
cJSON object.

Changes:
- Bump breadboard pin to v0.22.0 and delete .breadboard/ for fresh fetch
- Add knot_walk() to knot component: iterates peers under mutex, allows
  early abort via callback return value
- Extract per-peer JSON builder build_knot_peer_json() from existing
  build_knot_json() array builder, keeping existing tests green
- Rewrite knot_handler to use streaming API: no malloc, no full-tree build
- Add tests for knot_walk (iteration, early abort) and per-peer builder
  (single peer, matching array builder)

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

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