Delete row sig_1da3a8aea1f9 from signals

id sig_1da3a8aea1f9
event_id evt_31cbf7329dc3
watcher_id NULL
signal_type discovery_new_listings_snapshot
value {"as_of":"2026-04-16T08:14:25.857162+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_rss
reason_trace {}
dedupe_key discovery_new_listings_snapshot:3b6c26cba999bae2
throttle_s 0
created_at 2026-04-16T08:14:25.857162+00:00
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