Delete row sig_fb29abbda3c6 from signals

id sig_fb29abbda3c6
event_id evt_db336c30fbbc
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:d73811d650915fdb
throttle_s 0
created_at 2026-04-09T03:57:12.238833+00:00
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