Delete row sig_ff9e271517a8 from signals

id sig_ff9e271517a8
event_id evt_13f8f43c5f91
watcher_id NULL
signal_type market_headlines_snapshot
value {"as_of":"2026-04-17T22:00:46.070950+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_headlines_snapshot:d049da93d7412d31
throttle_s 0
created_at 2026-04-17T22:00:46.070950+00:00
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