AWS RDS provisioning via boto3 — subnet groups (≥2 AZs required), security groups, parameter groups vs option groups per engine, PubliclyAccessible networking, engine version resolution for SQL Server and Oracle, engine-specific admin usernames and gotchas, polling patterns, and RDS vs Aurora distinction. Use when provisioning or tearing down RDS instances for MySQL, PostgreSQL, SQL Server, or Oracle; choosing between RDS and Aurora; or understanding why forgedb targets RDS (not Aurora) for managed database provisioning.
