Delete row sig_fa8b48a6442a from signals

id sig_fa8b48a6442a
event_id evt_e1c7bb4630b6
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-15T00:27:18.627221+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:a9be1cbc6d72ac58
throttle_s 0
created_at 2026-04-15T00:27:18.627221+00:00
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