staticaddr/loopin: persist risk decisions

Store server confirmation-risk decisions with static loop-in swaps and
recover accepted payment-deadline timers after restart. Wire
notification persistence through loopd so recovered swaps do not lose
pending risk state.

Deduplicate notification fanout cache entries by swap hash.

loopdb/sqlc/queries/static_address_loopin.sql

@@ -33,6 +33,14 @@ SET
 WHERE
     swap_hash = $1;
 
+-- name: RecordStaticAddressRiskDecision :exec
+UPDATE static_address_swaps
+SET
+    confirmation_risk_decision = $2,
+    confirmation_risk_decision_time = $3
+WHERE
+    swap_hash = $1;
+
 -- name: InsertStaticAddressMetaUpdate :exec
 INSERT INTO static_address_swap_updates (
     swap_hash,
@@ -150,4 +158,3 @@ WHERE
 
 
 
-