Fix workflow branch configuration to enable CI on pull requests

[Copilot]

• Understand the issue: workflow triggers on 'master' branch but repo uses 'main'
• Build and test current state - all tests passing
• Update workflow file to trigger on 'main' branch instead of 'master'
• Verify workflow syntax and configuration
• Test that changes don't break existing functionality - all tests passing
• Complete code review - no issues found
• Complete security scan - no vulnerabilities found
• Fix test reporter permissions error

Summary

Fixed the GitHub Actions workflow to trigger on the main branch and added necessary permissions for the test reporter action to work correctly in pull requests.

Changes

• Updated workflow trigger branches from master to main
• Updated NuGet publish conditional to use main instead of master
• Added explicit permissions for contents: read, checks: write, and pull-requests: write to allow the test reporter to create check runs

Security Summary

No security vulnerabilities found.

Original prompt

I cannot see the current build and tests pipeline in the pull request

---

💡 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.

[larsbuch]

@copilot I get errors when test needs to be published. Log: 2025-11-05T19:31:06.3123312Z ##[group]Run dorny/test-reporter@v1
with:
name: Test Results
path: **/test-results.trx
reporter: dotnet-trx
path-replace-backslashes: false
list-suites: all
list-tests: all
max-annotations: 10
fail-on-error: true
fail-on-empty: true
only-summary: false
token: ***
env:
DOTNET_ROOT: /usr/share/dotnet
Action was triggered by pull_request: using SHA from head of source branch
Check runs will be created with SHA=327b394929659416ac5e51bf4c581aef0ac458b6
Listing all files tracked by git
Found 12 files tracked by GitHub
Using test report parser 'dotnet-trx'
Creating test report Test Results
HttpError: Resource not accessible by integration

[Copilot]

@copilot I get errors when test needs to be published. Log: 2025-11-05T19:31:06.3123312Z ##[group]Run dorny/test-reporter@v1
with:
name: Test Results...

Fixed in commit 03c1564. Added explicit permissions to the workflow for contents: read, checks: write, and pull-requests: write. This allows the test reporter action to create check runs on pull requests.