Delete row sig_e29c9f312da2 from signals

id sig_e29c9f312da2
event_id evt_5cc87cc98067
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_37d7da69f ...
dedupe_key signal_enriched:news_delta:080dc32744177120
throttle_s 0
created_at 2026-04-18T03:42:55.453819+00:00
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