Delete row sig_2416e7800c95 from signals

id sig_2416e7800c95
event_id evt_c33de5fb2f4a
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-11T23:37:40.672288+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:be8b53970325dd42
throttle_s 0
created_at 2026-04-11T23:37:40.672288+00:00
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