Delete row sc_57be6902aea68645 from signal_candidates

id sc_57be6902aea68645
status failed
signal_type news_headline_delta
source news_rss
url https://news.google.com/rss/articles/CBMitwFBVV95c ...
headline Microsoft finally lets Windows 11 testers unlock e ...
source_event_id evt_ec9ad22ba3bc
dedupe_key news_delta:a43b2090628d4d4a
claim_id NULL
claimed_by NULL
claimed_at NULL
lease_expires_at NULL
attempt_count 3
failed_at 2026-04-10T23:49:40.761667+00:00
last_error extraction_failed: Unterminated string starting at ...
output_event_id NULL
created_at 2026-04-10T21:57:55.321639+00:00
updated_at 2026-04-10T23:49:40.761667+00:00
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