Delete row sig_7c452b5a3693 from signals

id sig_7c452b5a3693
event_id evt_8eb82c375b9f
watcher_id NULL
signal_type discovery_options_flow_delta
value {"aggregator_url":"https://www.nasdaq. ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_ingestor
reason_trace {"_evidence_event_ids":["evt_ff048486d ...
dedupe_key signal_enriched:discovery_options_flow_delta:fbe19 ...
throttle_s 0
created_at 2026-04-09T18:05:02.959642+00:00
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