Update

src/main/java/com/libraryman_api/exception/ResourceNotFoundException.java

@@ -10,6 +10,23 @@
  */
 public class ResourceNotFoundException extends RuntimeException {
 
+    /**
+     * The {@code serialVersionUID} is a unique identifier for each version of a serializable class.
+     * It is used during the deserialization process to verify that the sender and receiver of a
+     * serialized object have loaded classes for that object that are compatible with each other.
+     *
+     * The {@code serialVersionUID} field is important for ensuring that a serialized class
+     * (especially when transmitted over a network or saved to disk) can be successfully deserialized,
+     * even if the class definition changes in later versions. If the {@code serialVersionUID} does not
+     * match during deserialization, an {@code InvalidClassException} is thrown.
+     *
+     * This field is optional, but it is good practice to explicitly declare it to prevent
+     * automatic generation, which could lead to compatibility issues when the class structure changes.
+     *
+     * The {@code @Serial} annotation is used here to indicate that this field is related to
+     * serialization. This annotation is available starting from Java 14 and helps improve clarity
+     * regarding the purpose of this field.
+     */
     @Serial
     private static final long serialVersionUID = 1L;
 

src/main/resources/application-development.properties

@@ -12,6 +12,12 @@ spring.datasource.password= Add_Your_Password
 
 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
 spring.jpa.hibernate.ddl-auto=update
-spring.jpa.show-sql=true
+spring.jpa.properties.hibernate.format_sql=true
+
+
+server.error.include-binding-errors=always
+server.error.include-message=always
+server.error.include-stacktrace=never
+server.error.include-exception=true
 
 logging.level.org.springframework.security = TRACE

src/main/resources/application.properties

@@ -1,2 +1,2 @@
 spring.application.name=libraryman-api
-spring.profiles.active=${ENV:development}
+spring.profiles.active=${ENV:dev}