Delete row sig_e2e0e891c802 from signals

id sig_e2e0e891c802
event_id evt_c3b127360376
watcher_id NULL
signal_type market_prices_snapshot
value {"as_of":"2026-04-14T22:20:11.769960+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_prices_snapshot:bb37573d3328c4d6
throttle_s 0
created_at 2026-04-14T22:20:11.769960+00:00
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