docs: clarify pagination_client_enabled configuration

[mdavid-dev]

Fixes #2214

Problem

The documentation for pagination_client_enabled was confusing:

• The section title "Disabling the Pagination Client-side" was misleading
• The example showed pagination_client_enabled: false, which actually prevents clients from controlling pagination

Solution

• Renamed section to "Allowing the Client to Control Pagination"
• Changed example value from false to true
• Clarified that pagination_client_enabled defaults to false and must be set to true to enable client control

Related issues: #2204, #2174, #2216