Fix and simplify filter logic for publishedDecades

[glorenzen]

This adds a small change to the publishedDecades filter query to allow for decades before 1000 and simplifies it a bit as well.

[advplyr]

This wasn't working in my testing. The client was crashing because a number was getting added to the filter in libraries.js instead of a string.
When padding the string with 0 the query wasn't working for years < 1000.

Since using string comparison isn't going to work well I updated it to cast to integer. That's not ideal but maybe in the future we update that column to integer.

[glorenzen]

Ah, got it. I see why the updates you made were needed, but now I'm confused how it worked when I tested it.

Oh well. Thanks for the fixes!

[pwinnski]

Thank you both!