Character location history

This could possibly fit in #98, but I wanted to open up the discussion a bit more. I would love to track current locations of player and non-player characters, but there's no link between characters and locations except for birthplace.

Ideally, I think a LocationTime data type would be great. While playing, if the players decide to go to another city, I could quickly pop in and fill out some form that says "MOVE (Character 1, character 2) TO LocationA on WhateverDate.

That being said, it may also require some kind of Time data type (given how fucked up fantasy worlds can be with the different eras and whatnot).

This would also open up the app to showing players' movement over time, and possibly automating certain characters' movement in the future (merchants on shipping routes, wandering bandits, etc)

Thoughts?

Start by comparing this proposal with issue #98, which the report says may overlap. The issue names no files, tests, or entry points; clarify the character/location history model, time representation, and initial move workflow before implementation. Done should be a defined, agreed scope rather than the broader future automation and movement views.

Written by the indexing model from the issue text.