Delete row sig_5f211eaee972 from signals

id sig_5f211eaee972
event_id evt_1b669c62e663
watcher_id NULL
signal_type market_headlines_snapshot
value {"as_of":"2026-04-19T20:59:34.662387+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_headlines_snapshot:38590eecef1fbcd2
throttle_s 0
created_at 2026-04-19T20:59:34.662387+00:00
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