The database queries in the @Query annotations were in a range of
different styles which made them difficult to read, and difficult to
write new ones in a consistent style.
Fix this.
Write a new tool, `sqlfmt`. This processes the DAO files looking for
`@Query(...)` annotations. It extracts the SQL from those annotations
and calls `sqlfluff` (https://github.com/sqlfluff/sqlfluff, which must
be installed separately) to lint and fix formatting issues in the SQL.
The file is re-written with the newly formatted SQL queries.
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