Add vnd.covar to packing

Author: Affie

src/entities/DFGVariable.jl

@@ -120,7 +120,7 @@ Base.@kwdef mutable struct PackedVariableNodeData
     solveInProgress::Int
     solvedCount::Int
     solveKey::Symbol
-    covar::Vector{Float64}
+    covar::Vector{Vector{Float64}}
     _version::String = string(_getDFGVersion())
 end
 

src/services/Serialization.jl

@@ -95,6 +95,7 @@ function packVariableNodeData(d::VariableNodeData{T}) where {T <: InferenceVaria
                                 d.solveInProgress,
                                 d.solvedCount,
                                 d.solveKey,
+                                vec.(d.covar),
                                 string(_getDFGVersion()))
 end
 
@@ -125,7 +126,7 @@ function unpackVariableNodeData(d::PackedVariableNodeData)
         id = d.id,
         val = vals, 
         bw = BW, 
-        # covar = #FIXME serialize covar
+        covar = d.covar,
         BayesNetOutVertIDs = Symbol.(d.BayesNetOutVertIDs),
         dimIDs = d.dimIDs, 
         dims = d.dims,