Delete row sig_f5cce5a0dbbc from signals

id sig_f5cce5a0dbbc
event_id evt_71be7e23a5a2
watcher_id NULL
signal_type system_distress
value {"alerts":[{"level":"critical& ...
threshold NULL
direction NULL
severity high
window NULL
source observability
reason_trace {}
dedupe_key observability_alert:2026-04-18T08
throttle_s 0
created_at 2026-04-18T08:00:10.231722+00:00
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