chore(python): Rename start_span parameter

[sentrivana]

We'll be changing the name of this parameter, updating.

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PRE-MERGE CHECKLIST

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• Checked Vercel preview for correctness, including links
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• PR was reviewed and approved by a member of the Sentry docs team

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[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
sentry-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 24, 2025 9:08am

1 Skipped Deployment

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[codecov]

Bundle Report

Changes will increase total bundle size by 651 bytes (0.0%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-client-array-push	9.84MB	-6 bytes (-0.0%) ⬇️
sentry-docs-server-cjs	12.24MB	657 bytes (0.01%) ⬆️

Affected Assets, Files, and Routes:

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

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
static/chunks/pages/_app-*.js	-3 bytes	880.61kB	-0.0%
static/chunks/1831-*.js	-3 bytes	423.03kB	-0.0%
server/middleware-*.js	-5.55kB	1.0kB	-84.74%
server/middleware-*.js	5.55kB	6.55kB	555.3% ⚠️
static/s6CH76XVZSEFOemkCz2w7/_buildManifest.js (New)	684 bytes	684 bytes	100.0% 🚀
static/s6CH76XVZSEFOemkCz2w7/_ssgManifest.js (New)	77 bytes	77 bytes	100.0% 🚀
static/_qXl8wlC_RhlyrBGV0HR4/_buildManifest.js (Deleted)	-684 bytes	0 bytes	-100.0% 🗑️
static/_qXl8wlC_RhlyrBGV0HR4/_ssgManifest.js (Deleted)	-77 bytes	0 bytes	-100.0% 🗑️

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

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
1729.js	-3 bytes	1.75MB	-0.0%
../instrumentation.js	-3 bytes	1.08MB	-0.0%
9523.js	-3 bytes	1.05MB	-0.0%
../app/[[...path]]/page.js.nft.json	222 bytes	724.81kB	0.03%
../app/platform-redirect/page.js.nft.json	222 bytes	724.72kB	0.03%
../app/sitemap.xml/route.js.nft.json	222 bytes	722.2kB	0.03%

[sentrivana]

Will merge as soon as we release the change (in the next alpha)