Delete row sig_66f45671932c from signals

id sig_66f45671932c
event_id evt_68d8b42460d9
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-11T23:26:15.213214+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:f43473383113458a
throttle_s 0
created_at 2026-04-11T23:26:15.213214+00:00
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