Delete row sig_a5f2ac860b56 from signals

id sig_a5f2ac860b56
event_id evt_74c6822de03b
watcher_id NULL
signal_type discovery_sector_rotation_snapshot
value {"as_of":"2026-04-20T18:44:57.232675+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_rss
reason_trace {}
dedupe_key discovery_sector_rotation_snapshot:8b43d02f393b1db ...
throttle_s 0
created_at 2026-04-20T18:44:57.232675+00:00
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