fix: use direct map lookup in GetVirtualServerByHeader

[rogueslasher]

What does this PR do?

GetVirtualServerByHeader was iterating over m.virtualServers with a linear scan to find a match by vs.Name, despite m.virtualServers being a map[string]*config.VirtualServer already keyed by vs.Name. This replaces the O(n) loop with a direct O(1) map lookup.

Summary by CodeRabbit

• Bug Fixes
  • Improved virtual server header lookup to use a direct match, making results more reliable and efficient.
  • Continued to return the same “not found” message when no matching server is available.

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No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

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Plan: Pro

Run ID: 73638158-4363-433c-8cc9-adb3e359b0c3

📥 Commits

Reviewing files that changed from the base of the PR and between 3b36b81 and 6e1f908.

📒 Files selected for processing (1)

• internal/broker/broker.go

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📝 Walkthrough

Walkthrough

GetVirtualServerByHeader in broker.go replaces a full iteration over m.virtualServers with a direct map lookup using namespaceName as the key. Error behavior for missing entries is unchanged.

Changes

Virtual Server Lookup Optimization

Layer / File(s)	Summary
Direct map lookup replaces iteration internal/broker/broker.go	GetVirtualServerByHeader now uses m.virtualServers[namespaceName] directly instead of ranging over all entries to match by Name field. Same not found error path retained.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Suggested labels

review-effort/small

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: replacing iteration with a direct map lookup in GetVirtualServerByHeader.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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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[rogueslasher]

@coderabbitai review

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[rogueslasher]

@Patryk-Stefanski should i file issue (as the new contributing guidelines states )for this since the pr is really a small fix

thank you