Delete row sig_d0b7ee837b43 from signals

id sig_d0b7ee837b43
event_id evt_04c555ee6fd9
watcher_id NULL
signal_type market_headlines_snapshot
value {"as_of":"2026-04-09T04:35:22.648250+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_headlines_snapshot:416bdaaf9436f0f1
throttle_s 0
created_at 2026-04-09T04:35:22.648250+00:00
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