fix: workspaceID check doesn't return

[mleonidas]

Summary
Discovered during docker-compose troubleshooting that this check returned an error despite succeeding. This change resolves the issue. An image of the previous response is attached

Summary by CodeRabbit

• Bug Fixes
  • Fixed improper error handling when required workspace identification is missing, ensuring the system correctly terminates request processing upon encountering the error.

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[coderabbitai]

📝 Walkthrough

Walkthrough

A return statement was added to the RouteToWorkerAllPaths function to ensure processing halts after returning a 400 response for a missing X-Workspace-ID header, preventing further execution.

Changes

Cohort / File(s)	Summary
Early Exit Fix apps/workspace-engine-router/pkg/router/router.go	Added missing return statement after 400 error response for missing X-Workspace-ID header to prevent further processing

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A tiny return, but oh so grand,
Stops the flow with a steady hand,
No more wandering down the wrong path,
Just a swift 400, a quick aftermath! 🎯

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding a missing return statement in the workspaceID check to prevent continued execution after an error.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

• 📝 Generate docstrings

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