Delete row sig_4ea1b964a074 from signals

id sig_4ea1b964a074
event_id evt_72ef70a160b1
watcher_id NULL
signal_type discovery_crypto_extremes_snapshot
value {"as_of":"2026-04-22T07:06:43.380266+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_rss
reason_trace {}
dedupe_key discovery_crypto_extremes_snapshot:bde5ca04ffb66c2 ...
throttle_s 0
created_at 2026-04-22T07:06:43.380266+00:00
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