SqliteSessionService
https://github.com/google/adk-python/blob/v1.20.0/src/google/adk/sessions/sqlite_session_service.py#L94
IMO：
DatabaseSessionService
とカラムが異なる
eventsテーブル
https://github.com/google/adk-python/blob/v1.20.0/src/google/adk/sessions/database_session_service.py#L221
Add SqliteSessionService and a migration script to migrate existing DB using DatabaseSessionService to SqliteSessionService
ref:
https://github.com/google/adk-python/releases/tag/v1.19.0
追加
https://github.com/google/adk-python/commit/e2182544952c0174d1a8307fbba319456dca748b
aiosqlite
https://github.com/google/adk-python/blob/v1.20.0/src/google/adk/sessions/migrate_from_sqlalchemy_sqlite.py
DBからSQLiteに
__init__()はdb_pathのみ受け取る
https://github.com/google/adk-python/blob/v1.23.0/src/google/adk/sessions/sqlite_session_service.py#L139