Delete row sig_7e800c9c66c0 from signals

id sig_7e800c9c66c0
event_id evt_364afd0cf756
watcher_id NULL
signal_type market_headlines_snapshot
value {"as_of":"2026-04-17T20:17:13.678340+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_headlines_snapshot:02695cda0c11c8fc
throttle_s 0
created_at 2026-04-17T20:17:13.678340+00:00
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