Delete row sig_ddb52ef95df0 from signals

id sig_ddb52ef95df0
event_id evt_582dfeacea48
watcher_id NULL
signal_type discovery_sec_filing_delta
value {"aggregator_url":"https://www.sec.gov ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_sec_filings
reason_trace {"_evidence_event_ids":["evt_7a2e9c79e ...
dedupe_key signal_enriched:discovery_sec_filing_delta:c5a7225 ...
throttle_s 0
created_at 2026-04-07T03:18:43.308311+00:00
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