wangfq
f1c9358aad
feat(vd960DBN): TCP/MQTT log_* 命令支持快照流 stream=snapshot (2026-08-18)
- snapshot.c/h: 新增 snap_rec_to_json() — SnapRec 64B → JSON (channels 对齐 0xC0, variation 3B 符号扩展, misc_type 全枚举)
- tcp_json_srv.c: handle_log_stat/query/clear 加 stream 解析 + snapshot 分支
- iot_mqtt_srv.c: log_stat/query/clear 加 stream 解析 + snapshot 分支
- 事件流 count=0 按上限处理 (与 BLE 对齐); 快照 QUERY count≤2, CLEAR ~45ms
- 新增 gcc 隔离单测 tests/test_snap_to_json.c 34 断言全过
- devlog V4.1
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