Delete row sig_ccc949d776de from signals

id sig_ccc949d776de
event_id evt_ac14ee5fc710
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_327ebfcfc ...
dedupe_key signal_enriched:news_delta:3dc569174c1b45ea
throttle_s 0
created_at 2026-04-19T05:09:15.411229+00:00
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