Delete row sig_ccf2e20b27e8 from signals

id sig_ccf2e20b27e8
event_id evt_035a70a41066
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_b1d658556 ...
dedupe_key signal_enriched:news_delta:8bee047ce373ca63
throttle_s 0
created_at 2026-04-07T23:23:37.715094+00:00
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