Delete row sig_2203044cbbc7 from signals

id sig_2203044cbbc7
event_id evt_8c0e4657c1de
watcher_id NULL
signal_type market_headlines_snapshot
value {"as_of":"2026-04-19T11:09:33.780379+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {}
dedupe_key market_headlines_snapshot:b88f5caa28a094ee
throttle_s 0
created_at 2026-04-19T11:09:33.780379+00:00
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