fix: harden DynDNS recovery and publish v1.5.1

Dockerfile

@@ -1,12 +1,12 @@
 # syntax=docker/dockerfile:1.7
-ARG VERSION=v1.5.0
+ARG VERSION=v1.5.1
 ARG MINIMUM_UPDATE_VERSION=v1.4.0
 ARG MINIMUM_AGENT_PROTOCOL=2
 ARG RUNTIME_CONTRACT_VERSION=2
 ARG DATABASE_CONTRACT_VERSION=1
 ARG SCHEMA_VERSION=11
 
-FROM golang:1.25.13-alpine AS build
+FROM golang:1.26.9-alpine AS build
 
 ARG VERSION