Route private compound property writes through unified bytecode

[rogeralsing]

Summary

• route direct private named compound and logical property writes through production unified bytecode
• keep private receiver-chain hops and private deletes outside the admitted boundary
• update the unified bytecode expansion contract to remove stale private read/write/update decline wording

Verification

• rtk dotnet test tests/Asynkron.JsEngine.Tests -c Release --filter "FullyQualifiedNameUnifiedBytecodeProductionInvocationTests.PrivateNamedCompoundPropertyWrite_UsesUnifiedBytecodeProductionFastPath|FullyQualifiedNameUnifiedBytecodeProductionInvocationTests.PrivateNamedLogicalPropertyWrite_UsesUnifiedBytecodeProductionFastPath|FullyQualifiedNameUnifiedBytecodeProductionEligibilityTests.Evaluate_PrivateNamedCompoundPropertyWrite_AcceptsNamedPropertyOpcodes|FullyQualifiedNameUnifiedBytecodeProductionEligibilityTests.Evaluate_PrivateNamedLogicalPropertyWrite_AcceptsNamedPropertyOpcodes|FullyQualifiedNameUnifiedBytecodeProductionEligibilityTests.Evaluate_PrivateNamedPropertyDelete_DeclinesWithExplicitCode|FullyQualifiedNameExpressionProgramCoverageMapTests.UnifiedBytecodeExpansionContract_ListsRequiredHeadingsAndCurrentEnums"
• rtk dotnet test tests/Asynkron.JsEngine.Tests -c Release --filter "FullyQualifiedNameUnifiedBytecodeProductionEligibilityTests|FullyQualifiedNameUnifiedBytecodeProductionInvocationTests|FullyQualifiedNameUnifiedBytecodeProductionConstructCallTests|FullyQualifiedNameExpressionProgramCoverageMapTests"
• rtk dotnet build src/Asynkron.JsEngine/Asynkron.JsEngine.csproj -c Release
• rtk rg "EvaluateExpression(|ProfileEvaluateExpression(" src/Asynkron.JsEngine/Ast/TypedAstEvaluator.ExecutionPlanRunner*
• rtk git diff --check

Note: skipped Roslynator/format/duplication gates per maintainer request to get the code in.

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