Delete row sig_2af7fb91df05 from signals

id sig_2af7fb91df05
event_id evt_e5355b032850
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-16T08:37:40.603174+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:1daef39c44590cc6
throttle_s 0
created_at 2026-04-16T08:37:40.603174+00:00
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