Delete row sig_5ddda47e7e8c from signals

id sig_5ddda47e7e8c
event_id evt_a5e9948c9978
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:9bb067e9329bb90f
throttle_s 0
created_at 2026-04-14T21:04:46.252032+00:00
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