infra(Monitoring): Expose /metrics to new port

[emyller]

Serve Prometheus metrics from a separate process to avoid metrics loss under load.

This works in conjunction with:

• fix(Monitoring): Serve /metrics on a dedicated port flagsmith-common#158
• https://github.com/Flagsmith/pulumi/pull/156

Contributes to https://github.com/Flagsmith/pulumi/issues/147

Review effort: 1/5

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
docs	Ready	Preview, Comment	Jan 20, 2026 6:34pm

2 Skipped Deployments

Project	Deployment	Review	Updated (UTC)
flagsmith-frontend-preview	Ignored	Preview	Jan 20, 2026 6:34pm
flagsmith-frontend-staging	Ignored	Preview	Jan 20, 2026 6:34pm

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.09%. Comparing base (9468354) to head (cfacc61).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6533   +/-   ##
=======================================
  Coverage   98.09%   98.09%           
=======================================
  Files        1293     1293           
  Lines       46610    46610           
=======================================
  Hits        45722    45722           
  Misses        888      888           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-api-test:pr-6533	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-e2e:pr-6533	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-frontend:pr-6533	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-6533	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-6533	Finished ✅	Results ✅

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{Bugbot Autofix is OFF. To automatically fix reported issues with Cloud Agents, enable Autofix in the Cursor dashboard.}

This is the final PR Bugbot will review for you during this billing cycle

Your free Bugbot reviews will reset on February 10

Details

Your team is on the Bugbot Free tier. On this plan, Bugbot will review limited PRs each billing cycle for each member of your team.

To receive Bugbot reviews on all of your PRs, visit the Cursor dashboard to activate Pro and start your 14-day free trial.

[khvn26]

Can we update docs as well as part of this PR?

[emyller]

Can we update docs as well as part of this PR?

Attempted with 1c6f557.

This is now handled as part of Flagsmith/flagsmith-common#158, and cfacc61.