Delete row sig_019062a23bb6 from signals

id sig_019062a23bb6
event_id evt_d2cc20de00b5
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-22T14:11:15.689611+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:988e8dff742b47d4
throttle_s 0
created_at 2026-04-22T14:11:15.689611+00:00
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