Delete row sig_96bc16c2c0df from signals

id sig_96bc16c2c0df
event_id evt_bbc0048a1833
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-12T09:08:03.513276+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:7fb69e7b1608134e
throttle_s 0
created_at 2026-04-12T09:08:03.513276+00:00
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