Delete row sig_2af3023cd209 from signals

id sig_2af3023cd209
event_id evt_97e473e2d6e7
watcher_id NULL
signal_type market_headlines_snapshot
value {"as_of":"2026-04-18T02:08:40.452875+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_headlines_snapshot:c5f9348a907db965
throttle_s 0
created_at 2026-04-18T02:08:40.452875+00:00
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