Delete row sig_e30d69abd1fb from signals

id sig_e30d69abd1fb
event_id evt_b63622341a3d
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-17T08:45:51.670541+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:b8f5c70159a7f269
throttle_s 0
created_at 2026-04-17T08:45:51.670541+00:00
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