Delete row sig_3a35c9be3e2f from signals

id sig_3a35c9be3e2f
event_id evt_ff317976df20
watcher_id NULL
signal_type discovery_crypto_extremes_delta
value {"aggregator_url":"https://news.bitcoi ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_ingestor
reason_trace {"_evidence_event_ids":["evt_90c88c303 ...
dedupe_key signal_enriched:discovery_crypto_extremes_delta:ef ...
throttle_s 0
created_at 2026-04-10T14:13:04.518445+00:00
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