Fix downloadProtoFiles task causing pipeline failures due to GitHub API rate limiting

[Copilot]

The build pipeline was failing when the downloadProtoFiles Gradle task attempted to fetch proto files from GitHub API without authentication, resulting in 403 errors due to rate limiting.

Changes

• Modified client/build.gradle to skip proto file download when orchestrator_service.proto already exists in the repository
• Task now checks for file presence before attempting GitHub API calls

task downloadProtoFiles {
    ext.branch = project.hasProperty('protoBranch') ? project.protoBranch : 'main'

    doLast {
        def protoFile = new File(protoDir, 'orchestrator_service.proto')
        
        // Skip download if proto file already exists
        if (protoFile.exists()) {
            logger.info("Proto file already exists, skipping download")
            return
        }
        
        // ... download logic
    }
}

This allows builds to succeed using committed proto files without requiring GitHub API access.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/microsoft/durabletask-protobuf/commits
  • Triggering command: REDACTED, pid is -1 (http block)
• rt.services.visualstudio.com
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/java.lang.invoke=ALL-UNNAMED --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.prefs/java.util.prefs=ALL-UNNAMED --add-opens java.prefs/java.util.prefs=ALL-UNNAMED --add-opens java.base/java.nio.charset=ALL-UNNAMED --add-opens java.base/java.net=ALL-UNNAMED --add-opens java.base/java.util.concurrent.atomic=ALL-UNNAMED -XX:MaxMetaspaceSize=256m -XX:+HeapDumpOnOutOfMemoryError -Xms256m -Xmx512m -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en -Duser.variant -cp /home/REDACTED/.gradle/wrapper/dists/gradle-7.4-bin/c0gwcg53nkjbqw7r0h0umtfvt/gradle-7.4/lib/gradle-launcher-7.4.jar org.gradle.launcher.daemon.bootstrap.GradleDaemon 7.4 (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)