Only reconstruct gradients if attemptGradients

[Affie]

No description provided.

[codecov]

Codecov Report

Merging #1688 (b47a2a8) into master (1851b5d) will increase coverage by 20.89%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #1688       +/-   ##
===========================================
+ Coverage   55.50%   76.39%   +20.89%     
===========================================
  Files          74       74               
  Lines        5598     5618       +20     
===========================================
+ Hits         3107     4292     +1185     
+ Misses       2491     1326     -1165     

Impacted Files	Coverage Δ
...erialization/services/DispatchPackedConversions.jl	91.66% <ø> (+16.66%)	⬆️
src/entities/CliqueTypes.jl	100.00% <0.00%> (ø)
src/Serialization/entities/AdditionalDensities.jl	100.00% <0.00%> (ø)
...Serialization/entities/SerializingDistributions.jl	100.00% <0.00%> (ø)
src/ParametricUtils.jl	70.07% <0.00%> (+0.52%)	⬆️
src/services/SolveTree.jl	96.38% <0.00%> (+2.40%)	⬆️
src/services/FactorGraph.jl	70.66% <0.00%> (+3.11%)	⬆️
src/services/CalcFactor.jl	78.66% <0.00%> (+3.33%)	⬆️
src/services/BayesNet.jl	65.90% <0.00%> (+5.68%)	⬆️
src/entities/OptionalDensities.jl	8.77% <0.00%> (+6.95%)	⬆️
... and 37 more

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