Standardize Variable*

[Affie]

WIP

	VariableDFG	VariableCompute
✓	id::Union{UUID, Nothing}	id::Union{UUID, Nothing}	REMOVE
✓	label::Symbol	label::Symbol	label::Symbol
✓	tags::Vector{Symbol}	tags::Set{Symbol}	tags::Set{Symbol}
☐	timestamp::ZonedDateTime	timestamp::ZonedDateTime	timestamp::TimeDateZone
☐	nstime::String	nstime::Nanosecond	REMOVE
✓	ppes::Vector{MeanMaxPPE}	ppeDict::Dict{Symbol, AbstractPointParametricEst}	REMOVE
✓	blobEntries::Vector{Blobentry}	dataDict::Dict{Symbol, Blobentry}	blobentries::Blobentries
✓	metadata::String	smallData::Dict{Symbol, MetadataTypes}	bloblets::Bloblets
✓	solvable::Int	solvable::Base.RefValue{Int}	solvable::Base.RefValue{Int}
✓	solverData::Vector{PackedState}	solverDataDict::Dict{Symbol, VariableState{T, P, N}}	states::States
✓	variableType::String	-	type::TypeMetadata
✓	_version::VersionNumber	-

Notes:

• Consolidate VariableDFG and VariableCompute
• timestamp only, see Change to VariableDFG.missionnanosec alongside .timestamp #1087
• smallData -> bloblets
• solverDataDict-> states
• dataDict -> blobentries
• nstime different uses:
  • as 0-999_999 nanosecond part of time stamp now in timestamp,
  • as steady timestamp now in steadytime
• see pr for some progress