Delete row sig_24ba96f486e5 from signals

id sig_24ba96f486e5
event_id evt_c5910987e5d7
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-20T02:39:40.519328+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:8f09781189829d33
throttle_s 0
created_at 2026-04-20T02:39:40.519328+00:00
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