Delete row sig_208efb1533a6 from signals

id sig_208efb1533a6
event_id evt_bffe036f271b
watcher_id NULL
signal_type macro_prices_snapshot
value {"as_of":"2026-04-22T13:06:39.379218+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source macro_ingestor
reason_trace {}
dedupe_key macro_prices_snapshot:5bf19cc17580b115
throttle_s 0
created_at 2026-04-22T13:06:39.355776+00:00
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