Delete row sig_02c6127334ec from signals

id sig_02c6127334ec
event_id evt_458386353a9f
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-05T12:14:22.873627+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:a6a7777fdb111b2c
throttle_s 0
created_at 2026-04-05T12:14:22.873627+00:00
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