Delete row sig_3e127ce33ebf from signals

id sig_3e127ce33ebf
event_id evt_8dcc9334b57f
watcher_id NULL
signal_type discovery_unusual_volume_snapshot
value {"as_of":"2026-04-15T17:34:08.881930+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_rss
reason_trace {}
dedupe_key discovery_unusual_volume_snapshot:2ca9cbace27c7227
throttle_s 0
created_at 2026-04-15T17:34:08.881930+00:00
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