Add database backup drivers: mariadb-dump, mysqlpump, mydumper, xtrabackup

[Copilot]

• Create mariadb_dump.go - MariaDB dump driver using mariadb-dump command
• Create mariadb_dump_test.go - Tests for MariaDB dump driver
• Create mysqlpump.go - MySQL pump driver using mysqlpump command
• Create mysqlpump_test.go - Tests for MySQL pump driver
• Create mydumper.go - MyDumper driver using mydumper command
• Create mydumper_test.go - Tests for MyDumper driver
• Create xtrabackup.go - XtraBackup driver using xtrabackup command
• Create xtrabackup_test.go - Tests for XtraBackup driver
• Update base.go to register new database drivers
• Update Dockerfile to add required dependencies (mydumper, xtrabackup)
• Run tests to verify all new drivers work correctly
• Request code review
• Address code review feedback (fix mydumper exclude tables regex issue)
• Run CodeQL security scan
• Refactor Dockerfile to use multi-stage builds for smaller final image
• Add documentation for new database drivers (docs/database-drivers.md)

Original prompt

support more backup method (each one as standalone database driver):
mariadb-dump
mysqlpump
mydumper: https://github.com/mydumper/mydumper
XtraBackup

and add required deps in Dockerfile

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[LazuliKao]

@copilot make Dockerfile uses stages for building

[Copilot]

@copilot make Dockerfile uses stages for building

Refactored the Dockerfile to use multi-stage builds in commit 966dab8. Now uses 6 stages:

1. mydumper-builder - Compiles mydumper from source
2. xtrabackup-downloader - Downloads XtraBackup
3. sqlpackage-downloader - Downloads sqlpackage
4. influx-downloader - Downloads influx CLI
5. etcd-downloader - Downloads etcdctl
6. Final runtime stage - Contains only runtime dependencies

This keeps build tools (cmake, make, g++, etc.) out of the final image.

[LazuliKao]

@copilot add documents for using these new driver

[Copilot]

@copilot add documents for using these new driver

Added documentation in commit bf103a0:

• Created docs/database-drivers.md with detailed configuration for all 4 new drivers
• Updated README.md to list the new drivers and link to the documentation

The docs include configuration examples, options tables, usage notes, and a comparison table.