chore(ci): 🔧 add grpc plugin support to build workflow

Updated CI workflow to install grpc-plugins and configure the gRPC plugin path for dotnet publish. This ensures proper generation of gRPC code during build and improves compatibility with gRPC-based projects.

Author: caunt

.github/workflows/publish-builds.yml

@@ -127,10 +127,10 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Install Alpine Prerequisites
-        run: apk add --no-cache clang build-base zlib-dev protoc
+        run: apk add --no-cache clang build-base zlib-dev protoc grpc-plugins
 
       - name: Publish Application
-        run: dotnet publish src/EcoFlow.Mqtt.Api/EcoFlow.Mqtt.Api.csproj -c Release -r ${{ matrix.runtimeIdentifier }} -o ./publish/${{ matrix.runtimeIdentifier }} -p:Protobuf_ProtocFullPath=/usr/bin/protoc
+        run: dotnet publish src/EcoFlow.Mqtt.Api/EcoFlow.Mqtt.Api.csproj -c Release -r ${{ matrix.runtimeIdentifier }} -o ./publish/${{ matrix.runtimeIdentifier }} -p:Protobuf_ProtocFullPath=/usr/bin/protoc -p:gRPC_PluginFullPath=/usr/bin/grpc_csharp_plugin
 
       - name: Upload Build Artifact
         uses: actions/upload-artifact@v6