Delete row sig_7572875e59a1 from signals

id sig_7572875e59a1
event_id evt_da37fadedd62
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_41b8696cd ...
dedupe_key signal_enriched:discovery_sec_filing_delta:9a308b6 ...
throttle_s 0
created_at 2026-04-18T03:05:05.644967+00:00
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