Delete row sig_d98692db8548 from signals

id sig_d98692db8548
event_id evt_1e4346ccdaac
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-20T08:21:31.131973+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:3d7f948d7ce93c26
throttle_s 0
created_at 2026-04-20T08:21:31.131973+00:00
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