Delete row sig_e49b4568e487 from signals

id sig_e49b4568e487
event_id evt_ebc059d10e74
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_da1af543a ...
dedupe_key signal_enriched:news_delta:fd6ab73dcfa5ff83
throttle_s 0
created_at 2026-04-21T11:29:33.908461+00:00
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