fix(easy-sql): add databaseName once for 3-part names (#2127)

parseTableSchema case 3 added databaseName to databaseList twice,
duplicating the database entry for db.schema.table names. Add once,
mirroring case 4.

Fixes #2121

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: openai0229 <136558319+openai0229@users.noreply.github.com>