MySQL connections

Workflows could already query PostgreSQL. Now they can query MySQL and MariaDB too.

Add a MySQL connection with a connection URL and your workflows get query, list_tables and describe_table, plus execute if you tick Allow writes. It's kept in check the same way PostgreSQL is:

• Read-only by default. Queries run inside read-only transactions, so a DELETE in a query step is refused by the database itself.
• Bounded. A 15 second time limit, a 1,000 row cap, and one statement per call.
• Parameters, not string pasting. Write ? placeholders and pass values in params, and the driver escapes them, so a customer name from a Slack message can't turn into SQL.
• TLS your way. Pick preferred, required, verify-ca or verify-identity.

See Connections for setup.