[metrics] fix prometheus registry

[capcom6]

Summary by CodeRabbit

• Bug Fixes
  • Improved metrics endpoint initialization for better registry handling.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: e0ad1acd-cee1-4d0c-989f-7b29231cd85e

📥 Commits

Reviewing files that changed from the base of the PR and between 36f51fe and 85797f5.

📒 Files selected for processing (1)

• internal/sms-gateway/modules/metrics/handler.go

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📝 Walkthrough

Walkthrough

This PR updates the metrics HTTP handler to initialize the fiberprometheus middleware using NewWithDefaultRegistry("") instead of New(""), which changes how the default Prometheus registry is selected for the /metrics endpoint.

Changes

Metrics Handler Registry Initialization

Layer / File(s)	Summary
Metrics handler registry initialization internal/sms-gateway/modules/metrics/handler.go	The fiberprometheus middleware constructor is updated to use NewWithDefaultRegistry("") for proper default Prometheus registry initialization.

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 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 clearly and concisely describes the main change: fixing how the Prometheus registry is initialized in the metrics handler.
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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[github-actions]

🤖 Pull request artifacts

Platform	File
🐳 Docker	GitHub Container Registry
🍎 Darwin arm64	server_Darwin_arm64.tar.gz
🍎 Darwin x86_64	server_Darwin_x86_64.tar.gz
🐧 Linux arm64	server_Linux_arm64.tar.gz
🐧 Linux i386	server_Linux_i386.tar.gz
🐧 Linux x86_64	server_Linux_x86_64.tar.gz
🪟 Windows arm64	server_Windows_arm64.zip
🪟 Windows i386	server_Windows_i386.zip
🪟 Windows x86_64	server_Windows_x86_64.zip