PR draft — ControlVariateStrategy == includes base_logpdf_type (fixes issue-02)

[docxology]

Problem

ControlVariateStrategy(==) compares only nsamples and buffer, ignoring base_logpdf_type.

Change

srd/strategies/control_variate.jl — compare base_logpdf_type (or its getter) too.

 function Base.:(==)(a::ControlVariateStrategy, b::ControlVariateStrategy)::Bool
-    return get_nsamples(a) == get_nsamples(b) && get_buffer(a) == get_buffer(b)
+    return get_nsamples(a) == get_nsamples(b) &&
+           get_buffer(a) == get_buffer(b) &&
+           a.base_logpdf_type == b.base_logpdf_type
 end

Verification

Add a unit test: two strategies equal in nsamples/buffer but differing in base_logpdf_type are !=.

Closes #100