docs: clarify NICo site controller sizing guidance for large sites

[TechWizard9999]

Fixes #5206

Adds a concise capacity-planning guideline (~5,000 managed compute nodes for a 5-node cluster on recommended hardware) with the caveat that this is a sizing guideline, not a hard limit — actual capacity varies by configuration, workload, and environment, so SVT/scalability validation is recommended for production BOMs.

/cc @sowsan for review

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• docs/getting-started/prerequisites/hardware.md

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Summary by CodeRabbit

• Documentation
  • Updated site controller recommendations to apply broadly to large sites, rather than specifically to GB200-class sites.
  • Clarified that the recommendation supports approximately 5,000 managed compute nodes, depending on configuration, workload, environment, and scalability validation.

Walkthrough

The hardware prerequisites documentation applies the five-node site controller recommendation to large sites generally. It retains the approximately 5,000 managed-node guideline and validation caveats.

Changes

Site controller sizing guidance

Layer / File(s)	Summary
Update capacity-planning guideline docs/getting-started/prerequisites/hardware.md	The documentation changes the five-node recommendation from large GB200-class sites to large sites generally. The approximately 5,000-node guideline and validation caveats remain.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to c0e55

This localized documentation update clarifies site-controller sizing guidance without changing product behavior or runtime configuration, so no actionable merge-blocking risk remains.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Linked Issues check	⚠️ Warning	The change addresses the large-site scope and approximately 5,000 managed-node guideline in [#5206]. The provided change summary does not confirm the required caveat about configuration-dependent capa…	Update the documentation to state that approximately 5,000 managed nodes is a planning guideline, not a hard limit; explain that capacity depends on configuration, enabled functionality, workload, BOM, and deployment environment; provide pr…

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the documentation change to NICo site controller sizing guidance for large sites.
Description check	✅ Passed	The description directly explains the approximately 5,000-node guideline, its limitations, and the recommended scalability validation.
Out of Scope Changes check	✅ Passed	The documented change is limited to NICo site controller sizing guidance and aligns with the scope of [#5206]. No unrelated changes are identified.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…

Full details: Linked Issues check

Explanation

The change addresses the large-site scope and approximately 5,000 managed-node guideline in [#5206]. The provided change summary does not confirm the required caveat about configuration-dependent capacity, the 3-node versus 5-node decision guidance, or SVT/scalability validation.

Resolution

Update the documentation to state that approximately 5,000 managed nodes is a planning guideline, not a hard limit; explain that capacity depends on configuration, enabled functionality, workload, BOM, and deployment environment; provide practical 3-node versus 5-node guidance; and recommend SVT/scalability validation for production sizing.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)

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Actionable comments posted: 1

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Inline comments:
In `@docs/getting-started/prerequisites/hardware.md`:
- Line 7: Update the hardware guidance around the site controller sizing
statement to define “large site” by managed compute-node count, tying the
five-node recommendation to an explicit threshold. Keep the three-node
high-availability minimum and the existing capacity-planning caveat intact.

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• docs/getting-started/prerequisites/hardware.md

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[TechWizard9999]

@polarweasel could you please review this ?