Delete row sig_01357b788d52 from signals

id sig_01357b788d52
event_id evt_0947dc537f7e
watcher_id NULL
signal_type market_headlines_snapshot
value {"as_of":"2026-04-12T10:33:54.760078+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_headlines_snapshot:0d9629a711795f7f
throttle_s 0
created_at 2026-04-12T10:33:54.760078+00:00
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