validate pet price and species

backend/src/main/java/com/petshop/backend/dto/chat/MessageRequest.java

@@ -1,7 +1,7 @@
 package com.petshop.backend.dto.chat;
 
 public class MessageRequest {
-    @jakarta.validation.constraints.Size(max = 10000, message = "Message content must not exceed 10000 characters")
+    @jakarta.validation.constraints.Size(max = 2000, message = "Message content must not exceed 2000 characters")
     private String content;
     private String attachmentUrl;
     private String attachmentName;

backend/src/main/java/com/petshop/backend/dto/pet/PetRequest.java

@@ -1,8 +1,11 @@
 package com.petshop.backend.dto.pet;
 
+import jakarta.validation.constraints.DecimalMax;
 import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Pattern;
 import jakarta.validation.constraints.Positive;
+import jakarta.validation.constraints.PositiveOrZero;
 import java.math.BigDecimal;
 import java.util.Objects;
 
@@ -11,6 +14,7 @@ public class PetRequest {
     private String petName;
 
     @NotBlank(message = "Species is required")
+    @Pattern(regexp = "^(Dog|Cat|Bird|Fish|Rabbit|Hamster|Guinea Pig|Reptile|Other)$", flags = Pattern.Flag.CASE_INSENSITIVE, message = "Species must be Dog, Cat, Bird, Fish, Rabbit, Hamster, Guinea Pig, Reptile, or Other")
     private String petSpecies;
 
     private String petBreed;
@@ -21,6 +25,8 @@ public class PetRequest {
     @NotNull(message = "Status is required")
     private String petStatus;
 
+    @PositiveOrZero(message = "Price must be zero or positive")
+    @DecimalMax(value = "99999.99", message = "Price must not exceed 99999.99")
     private BigDecimal petPrice;
 
     private Long customerId;