feat: custom database table name

It will be useful when user needs to some applications in same database

Look for database configuration and connection code in the codebase, likely in a config module or database driver. Identify where table names are currently defined and how they are used in queries. Determine the mechanism for allowing custom table names, such as environment variables or configuration files. Verify changes by running existing database-related tests.

索引モデルが issue の本文から書いたものです。