fix(ci): only build mcp-proxy to avoid fastembed 32-bit Windows issue

fastembed depends on ONNX Runtime which doesn't provide 32-bit Windows
binaries. Exclude it from dist build by specifying only mcp-proxy.

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

Author: soddygo

dist-workspace.toml

@@ -1,5 +1,6 @@
 [workspace]
-members = ["cargo:."]
+# 只包含需要发布的包，排除 fastembed 等不支持所有平台的包
+members = ["cargo:mcp-proxy"]
 
 # Config for 'dist'
 [dist]