[feat] MagnitudeVector and TraversalVector not implementation

I noticed that these two classes still haven't implemented the match methods. I'm interested in having a go at implementing them—could you provide some detailed explanations about these two classes?

Start by locating the MagnitudeVector and TraversalVector classes and reading their unimplemented match methods. Trace how these classes are used and compare their expected behavior with nearby vector implementations; done means both match methods have a clear, tested implementation, though the issue does not identify relevant tests or expected semantics.

Written by the indexing model from the issue text.