Delete row sig_030c54588f79 from signals

id sig_030c54588f79
event_id evt_2269296f1105
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-11T03:08:38.876889+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:e0044d6009d2612b
throttle_s 0
created_at 2026-04-11T03:08:38.876889+00:00
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