Update changelog and docs for SqliteBackupConnector

Author: whileman133

docs/changelog.rst

@@ -9,6 +9,7 @@ Unreleased
 * Drop support for end-of-life Python 3.7 and 3.8.
 * Drop support for end-of-life Django 3.2.
 * Drop support for ``DBBACKUP_STORAGE`` AND  ``DBBACKUP_STORAGE_OPTIONS`` settings, use Django's ``STORAGES['dbbackup']`` setting instead.
+* Implement new ``SqliteBackupConnector`` to backup SQLite3 databases using the ``.backup`` command (safe to execute on DBs with active connections).
 
 4.3.0 (2025-05-09)
 ----------

docs/databases.rst

@@ -128,6 +128,11 @@ simple raw copy of your database file, like a snapshot.
 
 In-memory database aren't dumpable with it.
 
+SqliteBackupConnector
+~~~~~~~~~~~~~~~~~
+
+The :class:`dbbackup.db.sqlite.SqliteBackupConnector` makes a copy of the SQLite database file using the ``.backup`` command, which is safe to execute with active connections to the database. It supports dumping in-memory databases by construction.
+
 MySQL
 -----