Add floatmax and floatmin methods for TrackedReal

These methods delegate to the underlying value type, following the same
pattern as eps. This fixes errors when code calls floatmax or floatmin
on TrackedReal types during autodiff.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: claude

src/tracked.jl

@@ -433,6 +433,12 @@ Base.rand(rng::Random.AbstractRNG, ::Type{TrackedReal{V,D,O}}) where {V,D,O} = T
 Base.eps(t::TrackedReal) = eps(value(t))
 Base.eps(::Type{T}) where {T<:TrackedReal} = eps(valtype(T))
 
+Base.floatmax(t::TrackedReal) = floatmax(value(t))
+Base.floatmax(::Type{T}) where {T<:TrackedReal} = floatmax(valtype(T))
+
+Base.floatmin(t::TrackedReal) = floatmin(value(t))
+Base.floatmin(::Type{T}) where {T<:TrackedReal} = floatmin(valtype(T))
+
 Base.floor(t::TrackedReal) = floor(value(t))
 Base.floor(::Type{R}, t::TrackedReal) where {R<:Real} = floor(R, value(t))
 

test/TrackedTests.jl

@@ -756,6 +756,12 @@ tr_rand = rand(MersenneTwister(1), TrackedReal{Int,Float64,Nothing})
 @test eps(tr_float) === eps(v_float)
 @test eps(typeof(tr_float)) === eps(Float64)
 
+@test floatmax(tr_float) === floatmax(v_float)
+@test floatmax(typeof(tr_float)) === floatmax(Float64)
+
+@test floatmin(tr_float) === floatmin(v_float)
+@test floatmin(typeof(tr_float)) === floatmin(Float64)
+
 @test floor(tr_float) === floor(v_float)
 @test floor(Int, tr_float) === floor(Int, v_float)