[Enhancement]:Inconsistent Naming Convention in API Endpoints

### What would you like to be added?

/api/v1/restore

{
  "async": true,
  "backup_name": "test_001",
  "dropExistCollection": true,
  "dropExistIndex": true,
  "metaOnly": false
} 

Some endpoints use snake_case (e.g., /backup_name)
Some use camelCase (e.g., dropExistCollection)

### Why is this needed?

_No response_

### Anything else?

_No response_