GHSA-H5X4-M2QF-R4F2 Diesel's SQLite backend has possible UTF-8 corruption

Diesel uses the sqlite3valuetext function to receive strings from SQLite while deserializing query results. We misinterpreted the corresponding SQLite documentation that this function always returns a UTF-8 encoded string values as const cchar. Based on that we used str::fromutf8unchecked to...