Delete row sig_e4589f2af895 from signals

id sig_e4589f2af895
event_id evt_0365eb97d900
watcher_id NULL
signal_type news_headline_delta
value {"aggregator_url":"https://news.google ...
threshold NULL
direction NULL
severity NULL
window NULL
source news_rss
reason_trace {"_evidence_event_ids":["evt_c41fbe610 ...
dedupe_key signal_enriched:news_delta:e0e26cb20e891a87
throttle_s 0
created_at 2026-04-09T03:06:55.825991+00:00
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