Delete row sig_fd08c6586f01 from signals

id sig_fd08c6586f01
event_id evt_f3e338335b86
watcher_id NULL
signal_type market_headlines_snapshot
value {"as_of":"2026-04-08T22:21:11.285215+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_headlines_snapshot:d36e3fd3f305a8d6
throttle_s 0
created_at 2026-04-08T22:21:11.285215+00:00
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