Remove Docker bridge MySQL principal with default credentials

[MoneroOcean]

Motivation

• Deployment bootstrap deployment/base.sql created a non-loopback MySQL principal pool@172.17.0.1 using the repository default password which broadened privileged DB access beyond loopback and exposed sensitive tables and configuration.

Description

• Removed the CREATE USER pool@172.17.0.1 line and the corresponding `GRANT ALL ON pool.* TO pool@`172.17.0.1 from deployment/base.sql, preserving the existing 127.0.0.1 and localhost principals.

Testing

• Ran automated file inspections with sed -n '1,40p' deployment/base.sql and nl -ba deployment/base.sql | sed -n '1,15p' and confirmed the file no longer contains the 172.17.0.1 user or its GRANT ALL entry; these checks succeeded.

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Codex Task