Delete row sig_76666589ff8a from signals

id sig_76666589ff8a
event_id evt_894e137f2467
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-09T23:08:02.386754+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:11b59339076b371d
throttle_s 0
created_at 2026-04-09T23:08:02.386754+00:00
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