auto-improve-database-guard-install

Tell the database guard of the agentic-auto-improve plugin which databases in this project are protected: finds the database names this project's tracked configuration files use, shows each with the file and line that names it, asks which to protect (and whether a Testing-environment database exists), and appends only those names to the project's rules file. Appends only, never removes a name; on a first install it says plainly that the guard then stops writes only to the listed databases and asks a separate yes or no. Prints the server-trigger line and its install command for a person to run. The name carries the plugin name because you may have several plugins installed. Use when: user says /auto-improve-database-guard-install, 'protect my databases', 'tell the database guard my database names', 'the database guard has no list', or 'add a database to the protected list'. Never edits a .sql file, never runs a database command, never removes a name.