Update docs on extra fields as attributes

[AbhiPrasad]

DESCRIBE YOUR PR

This PR updates the Python logging documentation to clarify how extra fields are handled by the Sentry SDK. Users were previously confused why extra fields weren't visible as a nested object in the Sentry UI. This change explains that fields within the extra dictionary are automatically promoted to top-level, searchable attributes on Sentry log entries.

Specifically:

• Added a "Working with Extra Fields" section to docs/platforms/python/integrations/logging/index.mdx.
• Added an "Extra Fields as Searchable Attributes" subsection to platform-includes/logs/integrations/python.mdx.

These updates ensure users understand that they can directly filter and query logs using these attributes (e.g., user_id:12345).

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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

LEGAL BOILERPLATE

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EXTRA RESOURCES

• Sentry Docs contributor guide

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[codecov]

Bundle Report

Changes will increase total bundle size by 375 bytes (0.0%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-client-array-push	9.9MB	-6 bytes (-0.0%) ⬇️
sentry-docs-server-cjs	12.48MB	381 bytes (0.0%) ⬆️

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	882.71kB	-0.0%
static/chunks/8321-*.js	-3 bytes	425.87kB	-0.0%
server/middleware-*.js	-5.55kB	1.0kB	-84.74%
server/middleware-*.js	5.55kB	6.55kB	555.3% ⚠️
static/icIshWpz3GnQT66FuGEZz/_buildManifest.js (New)	684 bytes	684 bytes	100.0% 🚀
static/icIshWpz3GnQT66FuGEZz/_ssgManifest.js (New)	77 bytes	77 bytes	100.0% 🚀
static/Tw_2ieufCECO-*.js (Deleted)	-77 bytes	0 bytes	-100.0% 🗑️
static/Tw_2ieufCECO-*.js (Deleted)	-684 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	1.78MB	-0.0%
../instrumentation.js	-3 bytes	1.1MB	-0.0%
9523.js	-3 bytes	1.08MB	-0.0%
../app/[[...path]]/page.js.nft.json	130 bytes	764.12kB	0.02%
../app/platform-redirect/page.js.nft.json	130 bytes	764.03kB	0.02%
../app/sitemap.xml/route.js.nft.json	130 bytes	761.5kB	0.02%