docs(rust): Remove NEW badge from metrics page

[sentry-junior]

DESCRIBE YOUR PR

Removes the new: true frontmatter flag from the Rust SDK metrics page, which drops the "NEW" sidebar badge. The page was added in #17545 (May 2026), so it's no longer new.

IS YOUR CHANGE URGENT?

• Urgent deadline (GA date, etc.): YYYY-MM-DD
• Other deadline: YYYY-MM-DD
• No deadline: Not urgent, can wait up to 1 week+

PRE-MERGE CHECKLIST

• Checked Vercel preview for correctness, including links
• PR was reviewed and approved by any necessary SMEs (subject matter experts)
• PR was reviewed and approved by a member of the Sentry docs team

via @szokeasaurusrex.

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Project	Deployment	Actions	Updated
sentry-docs	Ready	Preview	Oct 12, 2026 1:15pm UTC

1 Skipped Deployment

Project	Deployment	Actions	Updated
develop-docs	Ignored		Oct 12, 2026 1:15pm UTC

[cursor]

The change removes a NEW sidebar badge from one Metrics page. The plan checks errors and loads on that page. An issue escalates when errors appear or the page stops loading.

Monitoring in production

Services: sentry-docs.

Mention @change-monitor in a comment to update the plan.

Plan

What changed

The Rust Metrics sidebar item no longer shows a NEW badge. The page body stays the same. sentry-docs must deploy before this change is live.

Risk

A bad frontmatter parse can break this page or the Rust platform sidebar. The blast radius is one page and its nav item. Other sidebar NEW badges do not change.

Intended effect

This change has no queryable effect. The NEW badge is a visual sidebar mark. Telemetry does not record badge state. Absent would be the badge still visible on the Rust Metrics nav item. The executor cannot confirm that from metrics. Mark intended_effect unknown unless a person sees the badge is gone.

Regression watch

A bad page parse can drop this URL or throw a client error. Watch errors first. Watch page loads as a reachability signal. This page has very low traffic.

Signal	Baseline	Band	Window	Source
Errors on transaction /platforms/rust/metrics/	0 events	Hold at zero. Detected if the count rises above 0.	2026-10-11T13:09:00Z to 2026-10-12T13:09:00Z	Sentry sentry/docs, environment production
docs.page.load for path /platforms/rust/metrics/	2 loads. That is 2 of 6871 platform page loads.	Hold in 0-4 loads per 24h. Zero after deploy can be noise. Detected if loads stay at 0 for a full 24h while platform loads stay near 6800-6900.	2026-10-11T13:09:00Z to 2026-10-12T13:09:00Z	Sentry sentry/docs metric docs.page.load
docs.page.not_found for requested_path platforms/rust	0 events. The sum was null.	Hold at zero. Detected if the sum rises above 0.	2026-10-11T13:09:00Z to 2026-10-12T13:09:00Z	Sentry sentry/docs metric docs.page.not_found

If the error count rises, inspect sidebar render on Rust platform pages.

Not observable

Telemetry does not record the NEW badge on the sidebar. Pageload traces for this URL returned 0 spans. The trace sample rate is 30 percent and traffic is low.