4.9.0

The db-backup:4.9.x series will be the last before the 5.x.x release which is expected in August of 2026.
The tool is being rewritten from ground up, this last branch solves present day pain points and is seen as maintenance releases.

Added

  - Convert to nfrastack/base container base image
  - Alpine 3.24
  - Update MySQL to 9.7.2
  - Minor bug fixes with service start and shutdowns