Delete row sig_0011e89c8367 from signals

id sig_0011e89c8367
event_id evt_cde3cbaa2a6a
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_7e546ad4e ...
dedupe_key signal_enriched:news_delta:c19a2a27821fe7d0
throttle_s 0
created_at 2026-04-04T09:46:40.078709+00:00
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