Return exit code 1 on CTRL+C cancellation

[Mpdreamz]

Why

When a user presses CTRL+C, the process was exiting with code 0, making it indistinguishable from a successful run. This caused CI pipelines and shell scripts to silently swallow user-initiated cancellations as if the build had succeeded.

What

CatchExceptionMiddleware now sets context.ExitCode = 1 before returning on the CTRL+C path, so cancellation always signals failure to the caller — without emitting a spurious global error log entry.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: fdb8642f-4683-4687-b517-3a2ffa32592c

📥 Commits

Reviewing files that changed from the base of the PR and between a310432 and e85c858.

📒 Files selected for processing (1)

• src/tooling/docs-builder/Middleware/CatchExceptionMiddleware.cs

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📝 Walkthrough

Walkthrough

This PR adds a single line to the OperationCanceledException handler in CatchExceptionMiddleware. When CTRL+C triggers cancellation, the middleware now explicitly sets context.ExitCode = 1 before returning. Previously, the cancellation path only logged the event and returned without setting an exit code, which left the process exit status unset.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately and concisely summarizes the main change: setting exit code 1 when CTRL+C cancellation occurs.
Description check	✅ Passed	The description clearly explains the problem, the solution, and the specific implementation detail, all directly related to the changeset.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch fix/ctrl-c-exit-code

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