Fixes #210 Names the three savepoint state transitions in `LibsqlConnection` and moves savepoint-name resolution next to the type that owns it. - `beginSavepointTransaction` starts the transaction an auto-commit savepoint owns without sending `BEGIN`; a failed savepoint closes the fresh stream and leaves auto-commit on. - `discardSavepointsAfter` cancels the savepoints created after a rollback target, which stays active. - `closeTransactionOwnedBySavepoint` drops the released savepoint and its nested ones, and closes the stream only when the released savepoint is the outermost one that started the transaction. - `requireManualCommit(String action)` builds `Cannot <action> when in autoCommit mode`, so commit, rollback, and savepoint rollback/release keep their distinct messages. - `savepointSqlName` moved to `LibsqlSavepoint.sqlNameOf`; messages unchanged. - `beginTransaction` folded into its only caller, `ensureTransactionStarted`, and the redundant second lock in `setSavepoint(String)` dropped. Preserved: auto-commit savepoint opens the stream and its outermost release commits and closes it; failed implicit savepoint leaves auto-commit on; rollback/release in auto-commit send nothing; duplicate names resolve by `lastIndexOf`. No test or `pom.xml` change.

Commits

Commits on Oct 24, 2026

refactor(jdbc): name savepoint state transitions