Delete row sig_97cda9a36264 from signals

id sig_97cda9a36264
event_id evt_bea903f5b6c1
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_be9628c14 ...
dedupe_key signal_enriched:market_headline_delta:0b2bd010bfd7 ...
throttle_s 0
created_at 2026-04-10T22:35:37.204066+00:00
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