Delete row sig_afe328bb88ff from signals

id sig_afe328bb88ff
event_id evt_1499d685aee3
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-21T14:57:46.671566+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:b2a4676bf18f9cd2
throttle_s 0
created_at 2026-04-21T14:57:46.671566+00:00
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