[sql] Items audit part 1 [Flags, Stack Size, Furnishing storage/element]

[sruon]

I affirm:

• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• I have read and understood the Contributing Guide and the Code of Conduct.
• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

Straight from the DATs.

Certain items got their stack size increased in past updates, others got flags added to send to same account and a large portion of LSB items had the wrong flags to begin with because storing flags as raw values in SQL files is terrible and you should feel existential dread when doing it.

Steps to test these changes