docs(fastmcp-server): sync networkpolicy options

[mberlofa]

Summary

• document networkPolicy.extraEgress for fastmcp-server
• add fastmcp-server to the playground coverage allowlist

Validation

• make site-sync-check CHART=fastmcp-server
• npm run lint
• npm run format:check
• npm run build
• make release-check REPO=site
• make attribution-check REPO=site

Chart PR: helmforgedev/charts#665
Issue: helmforgedev/charts#633

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR updates the FastMCP Server documentation to describe the networkPolicy.extraEgress feature, adding an example egress rule, a new "Network Policy" section, and a Key Values table entry. It also registers fastmcp-server in the playground's site-sync configuration list.

Changes

FastMCP networkPolicy docs and playground registration

Layer / File(s)	Summary
Document networkPolicy.extraEgress support src/pages/docs/charts/fastmcp-server.mdx	Adds an extraEgress rule to the Production Profile example, a new "Network Policy" section explaining inbound restriction and outbound egress configuration, and a Key Values table row for networkPolicy.extraEgress.
Register fastmcp-server in playground configs src/pages/playground.astro	Adds the fastmcp-server slug to siteSyncPlaygroundConfigs, affecting the playgroundCharts filter.

Estimated code review effort: 1 (Trivial) | ~5 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title is concise and accurately describes the main documentation sync in this PR.
Description check	✅ Passed	The description covers the summary, validation, and related issue, and is mostly complete for this PR.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/fastmcp-server-template-standards-sync

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