Delete row sig_5d29c767440c from signals

id sig_5d29c767440c
event_id evt_26603d120350
watcher_id NULL
signal_type macro_yield_curve_snapshot
value {"as_of":"01/02/2026","date ...
threshold NULL
direction NULL
severity NULL
window NULL
source treasury
reason_trace {}
dedupe_key macro_yield_curve_snapshot:46ddcb042d4c271e
throttle_s 0
created_at 2026-04-04T02:11:24.136437+00:00
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