Delete row sig_9cf290be7afc from signals

id sig_9cf290be7afc
event_id evt_35b7964d4d76
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-15T01:58:10.345529+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:4bcdd0cff61d24fc
throttle_s 0
created_at 2026-04-15T01:58:10.345529+00:00
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