fix: go.mod 降级到 1.22，CI 加 GOTOOLCHAIN=local

避免 CI 里 Go 1.22 尝试下载 1.25.7 toolchain。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.forgejo/workflows/release.yml

@@ -19,6 +19,7 @@ jobs:
       - name: Build all platforms
         run: |
           export PATH="/usr/local/go/bin:$PATH"
+          export GOTOOLCHAIN=local
           cd cli
           for pair in darwin/arm64 darwin/amd64 linux/amd64 linux/arm64; do
             os="${pair%/*}"

cli/go.mod

@@ -1,3 +1,3 @@
 module github.com/agent-skills/auth-rt
 
-go 1.25.7
+go 1.22