Delete row sig_d9843956346d from signals

id sig_d9843956346d
event_id evt_23ee7db35dc2
watcher_id NULL
signal_type discovery_sector_rotation_snapshot
value {"as_of":"2026-04-20T12:09:20.976811+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_rss
reason_trace {}
dedupe_key discovery_sector_rotation_snapshot:4cf7e96a5038203 ...
throttle_s 0
created_at 2026-04-20T12:09:20.976811+00:00
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