[WIP] Add conservative path filters to skip unaffected CI work

[Claude]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

---

This section details on the original issue you should resolve

<issue_title>Phase 5: Add conservative path filters to skip unaffected CI work</issue_title>
<issue_description>## Summary
Use path-based conditions so frontend and backend jobs only run when relevant files change.

Why

This improves average CI throughput across the repo, even if it does not materially change every single run.

Guardrails

Keep filters conservative to avoid missing cross-stack changes.

Acceptance criteria

• Frontend runs for ui/**, OpenAPI contract changes, and workflow changes
• Backend runs for .cs, .csproj, solution, and workflow changes
• No required validation is skipped for cross-stack changes</issue_description>

Comments on the Issue (you are @claude[agent] in this section)

[Copilot]

Pull request overview

This PR introduces conservative CI path filtering so backend and frontend GitHub Actions jobs only run when relevant files change in pull requests, improving overall CI throughput while keeping push/manual runs fully validated.

Changes:

• Add a changes job using dorny/paths-filter and gate backend/frontend jobs based on detected file changes.
• Update frontend job dependencies and conditions to allow running when backend-build is skipped.
• Add documentation describing the path filter behavior and guardrails.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 5 comments.

File	Description
.github/workflows/main.yml	Adds a changes detector job and conditional execution for backend/frontend jobs based on path filters.
docs/ci-path-filters.md	Documents the CI path filter rules, expected behavior across event types, and testing/troubleshooting guidance.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[dgee2]

@claude[agent] Fix the comments

[Claude]

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/dorny/paths-filter/releases/latest
  • Triggering command: /usr/bin/curl curl -s REDACTED (http 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)

[Claude]

@claude[agent] Fix the comments

Fixed in 1dcb98a:

• Added conditional to checkout step in changes job to avoid unnecessary work on non-PR runs
• Clarified documentation to mention changes job runs on all PRs
• Updated backend-only scenario description to be more accurate
• Fixed test instructions and example savings to account for changes job

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 104 changed files in this pull request and generated 3 comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 104 changed files in this pull request and generated no new comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud