Delete row sig_e8b664e8f952 from signals

id sig_e8b664e8f952
event_id evt_50693a812321
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-18T06:00:35.210441+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:6ef1b36755172c0f
throttle_s 0
created_at 2026-04-18T06:00:35.210441+00:00
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