Delete row sig_05f7f927e801 from signals

id sig_05f7f927e801
event_id evt_b3ec1803ecb9
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-08T12:33:59.851279+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:c81d57dc1559aa62
throttle_s 0
created_at 2026-04-08T12:33:59.851279+00:00
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