Improve relink performance

[Toby222]

Cache library files instead of rewalking library for every missing entry
Improved PR of #611 that also improves performance for sqlite
Fixes #610

Only a rudimentary fix that could probably be improved by putting the cache somewhere more sensible but this works:tm:

[CyanVoxel]

Not sure if this is intended to be ready or not, but I see it's still modifying code in the legacy /tagstudio/src/core/library/json.py file instead of the proper /tagstudio/src/core/library/alchemy/library.py file.

[Toby222]

Not sure if this is intended to be ready or not, but I see it's still modifying code in the legacy /tagstudio/src/core/library/json.py file instead of the proper /tagstudio/src/core/library/alchemy/library.py file.

No it modifies both JSON and SQL (Though the JSON is obviously superfluous by now, but adding an extra commit just to remove it is also superfluous so pblbll)
The SQL missing file check simply isn't located in the alchemy folder but instead in tagstudio/src/core/utils/missing_files.py from what I could see.

[CyanVoxel]

Not sure if this is intended to be ready or not, but I see it's still modifying code in the legacy /tagstudio/src/core/library/json.py file instead of the proper /tagstudio/src/core/library/alchemy/library.py file.

No it modifies both JSON and SQL (Though the JSON is obviously superfluous by now, but adding an extra commit just to remove it is also superfluous so pblbll) The SQL missing file check simply isn't located in the alchemy folder but instead in tagstudio/src/core/utils/missing_files.py from what I could see.

Maybe there's been a misunderstanding, I am asking you to not modify the legacy JSON library file. This file should not have feature code added to it at all.

[Toby222]

Yup, I misunderstood what you meant ^^;
SQL-only now

[CyanVoxel]

#608 already added a library file cache here. Could you leverage that one instead of adding a new one?

[CyanVoxel]

@Toby222 Any updates on this?

[Toby222]

@Toby222 Any updates on this?

No, I got distracted by book releases and forgot until now :^)