NRules结合LINQ的规则反序列化问题及动态数据库规则管理解决方案咨询

最近我在折腾NRules的动态规则管理，想把要校验的规则存在数据库里，动态读取加载，所以得把规则转成JSON格式。我先拿NRules官网入门教程里的那个带LINQ Count 方法的交通违规附加费规则做测试，先贴一下原规则的C#代码：

public class TrafficViolationSurchargeRule : Rule { 
    public override void Define() { 
        InsuranceQuote quote = default!; 
        IEnumerable<TrafficViolation> violations = default!; 
        int totalViolations = 0; 

        When() 
            .Match(() => quote) 
            .Query(() => violations, q => q 
                .Match<TrafficViolation>() 
                .Where(v => v.Driver == quote.Driver, v => v.ViolationType != "Parking", v => v.Date >= DateTime.Now.AddYears(-2)) 
                .Collect()) 
            .Let(() => totalViolations, () => violations.Count()) 
            .Having(() => totalViolations > 1); 

        Then() 
            .Do(ctx => quote.ApplySurcharge(20 * totalViolations)); 
    } 
}

把这个规则序列化到JSON格式完全没遇到问题，生成的JSON输出如下（注：内容粘贴时出现截断，原本应包含完整的常量值）：

{ 
    "name": "Rules.TrafficViolationSurchargeRule", 
    "properties": [ 
        { 
            "name": "Fluent::ClrType", 
            "type": "System.Type", 
            "value": "Rules.TrafficViolationSurchargeRule, Rules, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" 
        } 
    ], 
    "leftHandSide": { 
        "elementType": "And", 
        "childElements": [ 
            { 
                "elementType": "Pattern", 
                "name": "quote", 
                "type": "Domain.InsuranceQuote, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" 
            }, 
            { 
                "elementType": "Pattern", 
                "name": "violations", 
                "type": "System.Collections.Generic.IEnumerable\u00601[[Domain.TrafficViolation, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]", 
                "source": { 
                    "elementType": "Aggregate", 
                    "name": "Collect", 
                    "resultType": "System.Collections.Generic.IEnumerable\u00601[[Domain.TrafficViolation, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]", 
                    "source": { 
                        "elementType": "Pattern", 
                        "name": "$this$", 
                        "type": "Domain.TrafficViolation, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null", 
                        "expressions": [ 
                            { 
                                "name": "Condition", 
                                "expression": { 
                                    "nodeType": "Lambda", 
                                    "parameters": [ 
                                        { 
                                            "name": "$this$", 
                                            "type": "Domain.TrafficViolation, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" 
                                        }, 
                                        { 
                                            "name": "quote", 
                                            "type": "Domain.InsuranceQuote, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" 
                                        } 
                                    ], 
                                    "body": { 
                                        "nodeType": "Equal", 
                                        "left": { 
                                            "nodeType": "MemberAccess", 
                                            "memberType": "Property", 
                                            "name": "Driver", 
                                            "declaringType": "Domain.TrafficViolation, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null", 
                                            "expression": { 
                                                "nodeType": "Parameter", 
                                                "name": "$this$", 
                                                "type": "Domain.TrafficViolation, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" 
                                            } 
                                        }, 
                                        "right": { 
                                            "nodeType": "MemberAccess", 
                                            "memberType": "Property", 
                                            "name": "Driver", 
                                            "declaringType": "Domain.InsuranceQuote, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null", 
                                            "expression": { 
                                                "nodeType": "Parameter", 
                                                "name": "quote", 
                                                "type": "Domain.InsuranceQuote, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" 
                                            } 
                                        } 
                                    } 
                                } 
                            }, 
                            { 
                                "name": "Condition", 
                                "expression": { 
                                    "nodeType": "Lambda", 
                                    "parameters": [ 
                                        { 
                                            "name": "$this$", 
                                            "type": "Domain.TrafficViolation, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" 
                                        } 
                                    ], 
                                    "body": { 
                                        "nodeType": "NotEqual", 
                                        "left": { 
                                            "nodeType": "MemberAccess", 
                                            "memberType": "Property", 
                                            "name": "ViolationType", 
                                            "declaringType": "Domain.TrafficViolation, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null", 
                                            "expression": { 
                                                "nodeType": "Parameter", 
                                                "name": "$this$", 
                                                "type": "Domain.TrafficViolation, Domain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" 
                                            } 
                                        }, 
                                        "right": { 
                                            "nodeType": "Constant", 
                                            "type": "string", 
                                            "value": 

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