Delete row sig_756fb3154d47 from signals

id sig_756fb3154d47
event_id evt_ba378695cd5a
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-17T11:11:31.386387+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:16de23f277a35539
throttle_s 0
created_at 2026-04-17T11:11:31.386387+00:00
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