Config List: Add search and pagination

[vprashrex]

Is your feature request related to a problem?
The config list endpoint lacks search and pagination signals, forcing clients to fetch all data and making UI pagination inefficient.

Describe the solution you'd like

• Add an optional name-based search query parameter
• Include a has_more flag in response metadata for proper pagination handling

Original issue

Is your feature request related to a problem? Please describe.
The config list endpoint lacks search and pagination signals, forcing clients to fetch all data and making UI pagination inefficient.

Describe the solution you'd like
Add an optional name-based search query parameter and include a has_more flag in response metadata for proper pagination handling.

Additional context
This enhancement enables scalable server-side filtering and supports UI patterns like “Load more” or infinite scrolling.