Delete row sig_d6ea98871683 from signals

id sig_d6ea98871683
event_id evt_e692e3bda1bc
watcher_id NULL
signal_type market_headline_delta
value {"aggregator_url":"https://news.google ...
threshold NULL
direction NULL
severity NULL
window NULL
source market_ingestor
reason_trace {"_evidence_event_ids":["evt_3267f15dd ...
dedupe_key signal_enriched:market_headline_delta:1f285697e34b ...
throttle_s 0
created_at 2026-04-19T03:40:37.813859+00:00
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