ref(rust): Adjust getting started docs for tracing

[lcian]

Adds getting started docs for the tracing integration.
This is our most popular integration, so we want to have a dedicated page to give it even more visibility.
Currently the only docs we have for this are here which means they're hard to find, and they only document the tracing functionality.

[vercel]

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Project	Deployment	Preview	Comments	Updated (UTC)
sentry-docs	Ready	Preview	Comment	Sep 12, 2025 9:51am

1 Skipped Deployment

Project	Deployment	Preview	Comments	Updated (UTC)
develop-docs	Ignored	Preview		Sep 12, 2025 9:51am

[codecov]

Bundle Report

Changes will decrease total bundle size by 72.39kB (-0.32%) ⬇️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-client-array-push	9.91MB	-290 bytes (-0.0%) ⬇️
sentry-docs-server-cjs	12.55MB	-72.1kB (-0.57%) ⬇️

Affected Assets, Files, and Routes:

view changes for bundle: sentry-docs-server-cjs

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
1729.js	-3 bytes	1.78MB	-0.0%
../instrumentation.js	-3 bytes	1.1MB	-0.0%
9523.js	-3 bytes	1.08MB	-0.0%
../app/[[...path]]/page.js.nft.json	-24.03kB	785.36kB	-2.97%
../app/platform-redirect/page.js.nft.json	-24.03kB	785.28kB	-2.97%
../app/sitemap.xml/route.js.nft.json	-24.03kB	782.75kB	-2.98%

view changes for bundle: sentry-docs-client-array-push

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
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server/middleware-*.js	-5.55kB	1.0kB	-84.74%
server/middleware-*.js	5.55kB	6.55kB	555.3% ⚠️
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static/tz-*.js (Deleted)	-684 bytes	0 bytes	-100.0% 🗑️

[coolguyzone]

I'm a little concerned that this could cause confusion since we also have our own 'Tracing' product. I think it's possible search might send people looking for /platforms/rust/tracing/ to this page or vice-versa. Would it make sense to update the title to something like 'tracing by tokio'? Or maybe add a little notification explaining that this is not about Sentry Tracing?

[coolguyzone]

See my note about the title, but overall looks good to me!

[adinauer]

/platforms/rust/tracing/ links to /platforms/rust/tracing/instrumentation/automatic-instrumentation/ here:

Do we also want to link to this new guide?

Also should /platforms/rust/tracing/instrumentation/automatic-instrumentation/ link to the guide too?

Do we want to include "Tokio" in the name of the guide? From what I understand the tracing crate and tokio:tracing aren't the same thing. Not sure if all rust devs know the difference. I'm a bit confused on the differences and what they have in common.

[lcian]

I mistakenly merged this as part of another commit.
Will update this one by addressing the feedback and then merge it.

[lcian]

Do we want to include "Tokio" in the name of the guide? From what I understand the tracing crate and tokio:tracing aren't the same thing. Not sure if all rust devs know the difference. I'm a bit confused on the differences and what they have in common.

For the record they're the same thing. The only confusion that could arise is from our own tracing product vs tokio-rs/tracing, therefore now I'm making it explicit what this is about.

[lcian]

/platforms/rust/tracing/ links to /platforms/rust/tracing/instrumentation/automatic-instrumentation/ here:
...
Do we also want to link to this new guide?

I think we can remove that link now as docs for the tracing integration are now easily findable.