Delete row sig_03596a321b36 from signals

id sig_03596a321b36
event_id evt_8bca4a20e653
watcher_id NULL
signal_type market_headlines_snapshot
value {"as_of":"2026-04-19T06:39:11.874350+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_headlines_snapshot:88ca4e43111e4798
throttle_s 0
created_at 2026-04-19T06:39:11.874350+00:00
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