feat: add property as a relation to an operation

Author: jwilkinson87

src/main/kotlin/com/ctrlhub/core/geo/Property.kt

@@ -0,0 +1,12 @@
+package com.ctrlhub.core.geo
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties
+import com.github.jasminb.jsonapi.StringIdHandler
+import com.github.jasminb.jsonapi.annotations.Id
+import com.github.jasminb.jsonapi.annotations.Type
+
+@Type("properties")
+@JsonIgnoreProperties(ignoreUnknown = true)
+data class Property(
+    @Id(StringIdHandler::class) val id: String? = null
+)

src/main/kotlin/com/ctrlhub/core/projects/operations/response/Operation.kt

@@ -1,6 +1,7 @@
 package com.ctrlhub.core.projects.operations.response
 
 import com.ctrlhub.core.api.Assignable
+import com.ctrlhub.core.geo.Property
 import com.ctrlhub.core.projects.operations.templates.response.OperationTemplate
 import com.ctrlhub.core.projects.response.Label
 import com.fasterxml.jackson.annotation.JsonCreator
@@ -28,14 +29,17 @@ class Operation @JsonCreator constructor(
     var assignees: java.util.List<Assignable>? = null,
 
     @Relationship("template")
-    var template: OperationTemplate? = null
+    var template: OperationTemplate? = null,
+
+    @Relationship("properties")
+    var property: java.util.List<Property>? = null,
 ) {
     constructor(): this(
         name = "",
         code = "",
         description = "",
         dates = null,
-        labels = emptyList()
+        labels = emptyList(),
     )
 }
 @JsonIgnoreProperties(ignoreUnknown = true)