Extension:CheckUser/cu useragent clienthints table

A table for the extension used to store unique combinations of client hints header names and their values. The rows in this table are referenced by the many-to-many map table table.

uach_id
Primary key, used to uniquely identify a cu_useragent_clienthints row. Referenced by the table table in the uachm_uach_id column.

uach_name
The name of the client hint value. The combinations of uach_name and uach_value are unique.

uach_value
The value associated with the name in uach_name. The combinations of uach_name and uach_value are unique.

Schema
mysql> describe cu_useragent_clienthints; ++--+--+-+-++ ++--+--+-+-++ ++--+--+-+-++
 * Field     | Type             | Null | Key | Default | Extra          |
 * uach_id   | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
 * uach_name | varbinary(32)    | NO   | MUL | NULL    |                |
 * uach_value | varbinary(255)  | NO   |     | NULL    |                |