Delete row sig_fda4f2e4e2a1 from signals

id sig_fda4f2e4e2a1
event_id evt_3df12889267c
watcher_id NULL
signal_type discovery_earnings_calendar_snapshot
value {"as_of":"2026-04-11T06:09:52.039662+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source discovery_earnings_calendar
reason_trace {}
dedupe_key discovery_earnings_calendar_snapshot:99f885d429fa7 ...
throttle_s 0
created_at 2026-04-11T06:09:52.039662+00:00
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