Delete row sig_28c44f539544 from signals

id sig_28c44f539544
event_id evt_739efaf6ec30
watcher_id NULL
signal_type discovery_options_flow_delta
value {"aggregator_url":"https://news.google ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_ingestor
reason_trace {"_evidence_event_ids":["evt_a683acd89 ...
dedupe_key signal_enriched:discovery_options_flow_delta:d40ef ...
throttle_s 0
created_at 2026-04-07T03:18:43.308311+00:00
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