The builder in decnet/web/db/mysql/database.py emits 'mysql+asyncmy://' URLs
(asyncmy is the declared dep in pyproject.toml). Tests were stale from a
prior aiomysql era.
- test_mysql_backend_live.py: live integration tests for MySQL connections
- test_mysql_histogram_sql.py: dialect-specific histogram query tests
- test_mysql_url_builder.py: MySQL connection string construction
- mysql_spinup.sh: Docker spinup script for local MySQL testing
