Delete row sig_bd5b8f100c00 from signals

id sig_bd5b8f100c00
event_id evt_bce432a762bf
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-22T12:30:21.577576+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:9002728fcc1bde85
throttle_s 0
created_at 2026-04-22T12:30:21.577576+00:00
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