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"@gsxdsm/fusion": patch
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Fix settings save failure by resolving race condition in parallel task creation and ensuring config row exists in SQLite.

- Fixed race condition in `allocateId()` where parallel task creation could cause `config.json` to have stale `nextId` values by wrapping the config sync in `withConfigLock()`
- Changed `writeConfig()` to use `INSERT OR REPLACE` instead of `UPDATE` to ensure the config row is created if missing
- Added error handling tests for settings save failures
- Added integration tests for SQLite settings persistence