docs(kv-cache): state that a ledger-less pool needs an explicit multiTenancy false

[thxCode]

What type of PR is this?

/kind documentation
/area worker

What this PR does / why we need it:

#695 made KVCacheBackend's leader.multiTenancy default to true. docs/kv-cache/pool.md still described the ledger-less master as the plain case. This says where one now comes from:

• a managed backend that declares leader.multiTenancy: false, which a store image older than Mooncake 0.3.12 has to (links to the build-variants section feat(api): default KVCacheBackend leader.multiTenancy to true #695 added in backend.md);
• an external master started without multi-tenancy.

It also updates the omitted domain.name bullet: on a multi-tenant master, default is the tenant the engines are handed, so each domain should be named once a second Binding shares the master. The kubectl get kvcpb example is now read from a managed backend's default rather than from an opt-in.

Which issue(s) this PR links to:

Relates #695

Special notes for your reviewer:

Docs only. make lint docs passes.

Does this PR introduce a user-facing change?

NONE

[gpustack-code-review]

🔍 OpenCodeReview found 2 issue(s) in this PR.

• ✅ Successfully posted inline: 0 comment(s)
• 📋 Routed to summary by policy: 2 comment(s)

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📄 docs/kv-cache/pool.md (L114-L115)

⚠️ GitHub could not post this as an inline comment: Routed to summary (severity low · category documentation)

The sentence "so name each domain once a second Binding shares the master" is ambiguous: "once" here means "when/if", but it can also read as "name each domain one time", which contradicts the following sentence saying a domain name is claimed per master and a second naming is rejected. Consider rephrasing, e.g. "so name each domain as soon as a second Binding shares the master" or "so give each domain its own name when a second Binding shares the master".

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📄 docs/kv-cache/pool.md (L116-L117)

⚠️ GitHub could not post this as an inline comment: Routed to summary (severity low · category style)

This edited line grew to ~105 characters while the surrounding bullets wrap near 90; rewrap for consistency (e.g. break after "registration").

💡 Suggested Change

Before:

  so the name only records the registration. It is claimed like any other name, so two Bindings that both leave it out collide on a
  shared master.

After:

  so the name only records the registration. It is claimed like any other name, so two Bindings
  that both leave it out collide on a shared master.