Delete row sig_fcb9555e9307 from signals

id sig_fcb9555e9307
event_id evt_da3e996203ea
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-10T03:32:27.532195+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:ceb92b554ded15a6
throttle_s 0
created_at 2026-04-10T03:32:27.532195+00:00
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