fix: stop sqlite db from being updated while running tests

[python357-1]

This PR fixes #644 by having make_tables check the current autoincrement value (what the next inserted row would have as its id) on the tags table. Previously, an INSERT and a DELETE were always being run when a library was opened, causing the file change counter to increase

close #644
close #646

[Computerdores]

Only running the DELETE and INSERT when they are necessary is definitely the better solution!
However could you explain why you did it this way? My intuition would have been to check whether the schema already matches and to DELETE and INSERT if not.

[python357-1]

I don't know how to check if the schema is the same to do this - even the sqldiff tool didn't detect this. The reason we are doing the insert and delete is to make sure the next auto increment ID is at least 1000. This implementation allows it to skip updating the database if the next ID is at least 1000.

[Computerdores]

This fixes the issue for me on Win10 and I don't see anything wrong with the code either (no idea whether using sessionmaker is better here, but I see nothing wrong with it)

[python357-1]

yeah i actually just fixed that, realized there was no need for that to be there lol