Add trigger checksum failures in template PostgreSQL Agent 2

Hello, please add trigger checksum failures in template PostgreSQL Agent 2 for item Dbstat: Checksum failures (Number of data page checksum failures detected (or on a shared object), or NULL if data checksums are not enabled. This metric included in PostgreSQL 12)

From PostgeSQL documentation: Use checksums on data pages to help detect corruption by the I/O system that would otherwise be silent.

Item Dbstat: Checksum failures without trigger to make no sense, when you see in last data checksum failures more then 0, it will be too late.