`push!` can leave the original array in a broken state

This seems fine:

A = KeyedArray(rand(Int8, 2); index=["a", "b"])
push!(A, 5)

1-dimensional KeyedArray(NamedDimsArray(...)) with keys:
↓   index ∈ 3-element Vector{Any}
And data, 3-element Vector{Int8}:
  ("a")   106
  ("b")  -121
 (3)        5

but:

A

ArgumentError: lengths of key vectors must match size of array (and their axes too)

Stacktrace:
  [1] construction_check
    @ ~/.julia/packages/AxisKeys/pm7Fb/src/struct.jl:30 [inlined]
  [2] KeyedArray
    @ ~/.julia/packages/AxisKeys/pm7Fb/src/struct.jl:17 [inlined]
  [3] KeyedArray
    @ ~/.julia/packages/AxisKeys/pm7Fb/src/struct.jl:20 [inlined]
  [4] unname
    @ ~/.julia/packages/AxisKeys/pm7Fb/src/names.jl:29 [inlined]
  [5] _summary(io::IOContext{IOBuffer}, x::KeyedArray{Int8, 1, NamedDimsArray{(:index,), Int8, 1, Vector{Int8}}, Base.RefValue{Vector{String}}})
    @ AxisKeys ~/.julia/packages/AxisKeys/pm7Fb/src/show.jl:16
  [6] summary
    @ ~/.julia/packages/AxisKeys/pm7Fb/src/show.jl:2 [inlined]
  [7] show(io::IOContext{IOBuffer}, #unused#::MIME{Symbol("text/plain")}, X::KeyedArray{Int8, 1, NamedDimsArray{(:index,), Int8, 1, Vector{Int8}}, Base.RefValue{Vector{String}}})
    @ Base ./arrayshow.jl:337
  [8] limitstringmime(mime::MIME{Symbol("text/plain")}, x::KeyedArray{Int8, 1, NamedDimsArray{(:index,), Int8, 1, Vector{Int8}}, Base.RefValue{Vector{String}}})
...

Start by reproducing the example with push! and then inspect the referenced paths in src/struct.jl, src/names.jl, and src/show.jl. Trace why the original KeyedArray no longer satisfies its key-length check after push!. Done means the original array remains valid and can be displayed without the ArgumentError.