Delete row sig_b8f100faf097 from signals

id sig_b8f100faf097
event_id evt_7a968090ebc2
watcher_id NULL
signal_type discovery_ipo_snapshot
value {"as_of":"2026-04-14T17:20:03.234817+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_rss
reason_trace {}
dedupe_key discovery_ipo_snapshot:a80dc5a53ce193aa
throttle_s 0
created_at 2026-04-14T17:20:03.234817+00:00
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