Fix NotificationRuleRecipientsConfig serialization with Jackson 2.18.x

In Jackson 2.18.x, EXISTING_PROPERTY type info combined with the no-arg
@JsonIgnoreProperties causes the triggerType discriminator field to be
silently excluded from the serialized JSON. When the server then tries to
deserialize the POST body for /api/notification/rule, Jackson cannot find
triggerType and throws "missing type id property 'triggerType'", resulting
in a 500 for NotificationEdgeTest.testNotificationRule.

Fix by:
1. Adding @JsonProperty("triggerType") to force the field into normal bean
   serialization, overriding any suppression by the type info machinery.
2. Replacing the no-arg @JsonIgnoreProperties with @JsonIgnoreProperties(
   ignoreUnknown = true) so unknown properties are ignored rather than
   causing errors (e.g. for forward compatibility).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

common/data/src/main/java/org/thingsboard/server/common/data/notification/rule/NotificationRuleRecipientsConfig.java

@@ -17,6 +17,7 @@ package org.thingsboard.server.common.data.notification.rule;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSubTypes;
 import com.fasterxml.jackson.annotation.JsonSubTypes.Type;
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
@@ -29,7 +30,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.UUID;
 
-@JsonIgnoreProperties
+@JsonIgnoreProperties(ignoreUnknown = true)
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "triggerType", visible = true, include = JsonTypeInfo.As.EXISTING_PROPERTY, defaultImpl = DefaultNotificationRuleRecipientsConfig.class)
 @JsonSubTypes({
         @Type(name = "ALARM", value = EscalatedNotificationRuleRecipientsConfig.class),
@@ -38,6 +39,7 @@ import java.util.UUID;
 public abstract class NotificationRuleRecipientsConfig implements Serializable {
 
     @NotNull
+    @JsonProperty("triggerType")
     private NotificationRuleTriggerType triggerType;
 
     @JsonIgnore