Delete row sig_003394e33d91 from signals

id sig_003394e33d91
event_id evt_f5974cf9064c
watcher_id NULL
signal_type market_headlines_snapshot
value {"as_of":"2026-04-05T08:51:30.686427+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_headlines_snapshot:c0922a73c28b4a08
throttle_s 0
created_at 2026-04-05T08:51:30.686427+00:00
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