Delete row sig_fb2a92d814e9 from signals

id sig_fb2a92d814e9
event_id evt_afea53677be9
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-12T01:09:05.979326+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:d9278be3f3147fb0
throttle_s 0
created_at 2026-04-12T01:09:05.979326+00:00
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