feat!: Add medians param to Token struct

[toteki]

Additional testing is needed to make sure this doesn't break mainnet state, old governance (containing Token struct), etc.

See the PR #1689 liked for one optimistic test and some more notes.

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[codecov-commenter]

Codecov Report

Merging #1685 (401599c) into main (d76c155) will not change coverage.
The diff coverage is 50.00%.

@@           Coverage Diff           @@
##             main    #1685   +/-   ##
=======================================
  Coverage   57.97%   57.97%           
=======================================
  Files          73       73           
  Lines        7821     7821           
=======================================
  Hits         4534     4534           
  Misses       2934     2934           
  Partials      353      353           

Impacted Files	Coverage Δ
x/leverage/keeper/oracle.go	62.93% <50.00%> (ø)

[adamewozniak]

this lgtm! this will change the leverage registry query response. let's get another review on here too
cc: @EbrahimUmee

[adamewozniak]

looks good!