fix: added protoc configuration

Author: raphael-goetz

.github/workflows/build.yml

@@ -41,6 +41,8 @@ jobs:
         run: rustup update --no-self-update stable
       - name: Install protoc
         run: curl -LO https://github.com/protocolbuffers/protobuf/releases/download/v28.0-rc1/protoc-28.0-rc-1-linux-x86_64.zip && unzip protoc-28.0-rc-1-linux-x86_64.zip -d ${{ runner.temp }}/proto && chmod +x ${{ runner.temp }}/proto/bin/protoc && ${{ runner.temp }}/proto/bin/protoc --version
+      - name: Configure protoc
+        run: protoc --proto_path=internal --rust_out=src/internal
       - name: Build crate
         run: PATH=${{ runner.temp }}/proto/bin:$PATH cargo build
         env: