Delete row sig_672c9581b4ee from signals

id sig_672c9581b4ee
event_id evt_5228e4e7f776
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_20be32361 ...
dedupe_key signal_enriched:discovery_sec_filing_delta:bbb1f6f ...
throttle_s 0
created_at 2026-04-17T02:13:18.114675+00:00
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