Delete row sig_e6b3f168fc5f from signals

id sig_e6b3f168fc5f
event_id evt_fe556a193ff3
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_cc9c4d63d ...
dedupe_key signal_enriched:market_headline_delta:d18e8fcbd22c ...
throttle_s 0
created_at 2026-04-09T15:51:36.226291+00:00
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