Delete row sig_fdd928ac1759 from signals

id sig_fdd928ac1759
event_id evt_1b50606e5dcd
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-11T23:05:32.698958+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:ef1299a768f0b06a
throttle_s 0
created_at 2026-04-11T23:05:32.698958+00:00
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