Delete row sig_dde0e095a71d from signals

id sig_dde0e095a71d
event_id evt_c20a8a35ef31
watcher_id NULL
signal_type market_headlines_snapshot
value {"as_of":"2026-04-20T13:10:00.104693+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_headlines_snapshot:6d786e033b36aeee
throttle_s 0
created_at 2026-04-20T13:10:00.104693+00:00
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