Delete row sig_ba808f0c24fc from signals

id sig_ba808f0c24fc
event_id evt_e028676fe0a1
watcher_id NULL
signal_type discovery_new_listings_snapshot
value {"as_of":"2026-04-21T13:49:56.264514+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_rss
reason_trace {}
dedupe_key discovery_new_listings_snapshot:554c3dd90e807950
throttle_s 0
created_at 2026-04-21T13:49:56.264514+00:00
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