Delete row sig_a5e1c694822d from signals

id sig_a5e1c694822d
event_id evt_2a8c61776d9b
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-09T13:19:54.368423+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:a290bed1ec05b46b
throttle_s 0
created_at 2026-04-09T13:19:54.368423+00:00
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