MySQL 8.4 fails to start in Backdrop recipe — deprecated Bitnami config parameters

When using mysql: 8.4 in the Backdrop recipe, the MySQL container fails to start with:
ERROR [MY-000067] [Server] unknown variable 'default_authentication_plugin=mysql_native_password'
ERROR [MY-000067] [Server] unknown variable 'expire_logs_days=10'

Root Cause:
Bitnami's MySQL initialization script writes these deprecated parameters (removed in MySQL 8.0+) to my.cnf during container boot, after Lando's build_as_root hooks have run. This makes them impossible to intercept via standard Lando configuration.

Steps to Reproduce:

1. Set mysql: 8.4 in .lando.yml with Backdrop recipe
2. Run lando start
3. See MySQL initialization failure

Current Workaround:
Use mysql: 5.7 instead

Suggested Fix:

• Consider using a different MySQL 8.4 image that doesn't auto-inject deprecated parameters
• OR add Lando post-boot hook support for services
• OR provide recipe-level option to skip Bitnami's default_authentication_plugin setting

Start with the MySQL 8.4 setting in .lando.yml and the Backdrop recipe, then run lando start to reproduce the initialization failure. Check when Bitnami writes my.cnf relative to Lando build_as_root hooks and determine which suggested integration approach is appropriate. Done means the MySQL 8.4 container starts without the deprecated parameters.