Delete row sig_80fcc70a48cb from signals

id sig_80fcc70a48cb
event_id evt_16c35fa05467
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-09T08:09:41.405955+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:10072689620835e2
throttle_s 0
created_at 2026-04-09T08:09:41.405955+00:00
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