Delete row sig_4d1b6a2899e6 from signals

id sig_4d1b6a2899e6
event_id evt_de238e108453
watcher_id NULL
signal_type discovery_ipo_snapshot
value {"as_of":"2026-04-19T22:59:40.646664+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_rss
reason_trace {}
dedupe_key discovery_ipo_snapshot:98e7f923205b10a8
throttle_s 0
created_at 2026-04-19T22:59:40.646664+00:00
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