Fix JavaDoc escaping in ConvenienceMethodGenerator

Fix compilation errors in CI caused by double-escaped newlines in JavaDoc
comments. Change \\n to \n in addJavadoc calls to generate proper JavaDoc
without illegal characters.

Author: wassertim

src/main/java/com/github/wassertim/dynamodb/toolkit/generation/ConvenienceMethodGenerator.java

@@ -62,11 +62,11 @@ private MethodSpec generateFromDynamoDbItemsMethod(String className, ClassName d
                         ClassName.get(Map.class),
                         ClassName.get(String.class),
                         attributeValue)), "items")
-                .addJavadoc("Convenience method to convert a list of DynamoDB items to domain objects.\\n")
-                .addJavadoc("Handles the common pattern of mapping QueryResponse.items() to domain objects.\\n")
-                .addJavadoc("\\n")
-                .addJavadoc("@param items List of DynamoDB items from QueryResponse.items() or ScanResponse.items()\\n")
-                .addJavadoc("@return List of $L objects, filtering out any null results\\n", className)
+                .addJavadoc("Convenience method to convert a list of DynamoDB items to domain objects.\n")
+                .addJavadoc("Handles the common pattern of mapping QueryResponse.items() to domain objects.\n")
+                .addJavadoc("\n")
+                .addJavadoc("@param items List of DynamoDB items from QueryResponse.items() or ScanResponse.items()\n")
+                .addJavadoc("@return List of $L objects, filtering out any null results\n", className)
                 .beginControlFlow("if (items == null || items.isEmpty())")
                 .addStatement("return new $T<>()", ClassName.get("java.util", "ArrayList"))
                 .endControlFlow()
@@ -86,11 +86,11 @@ private MethodSpec generateToDynamoDbItemMethod(String className, ClassName doma
                     ClassName.get(String.class),
                     attributeValue))
                 .addParameter(domainClass, "object")
-                .addJavadoc("Convenience method to convert a single domain object to a DynamoDB item.\\n")
-                .addJavadoc("Useful for PutItem operations.\\n")
-                .addJavadoc("\\n")
-                .addJavadoc("@param object The $L object to convert\\n", className)
-                .addJavadoc("@return DynamoDB item (Map<String, AttributeValue>), or null if input is null or conversion fails\\n")
+                .addJavadoc("Convenience method to convert a single domain object to a DynamoDB item.\n")
+                .addJavadoc("Useful for PutItem operations.\n")
+                .addJavadoc("\n")
+                .addJavadoc("@param object The $L object to convert\n", className)
+                .addJavadoc("@return DynamoDB item (Map<String, AttributeValue>), or null if input is null or conversion fails\n")
                 .beginControlFlow("if (object == null)")
                 .addStatement("return null")
                 .endControlFlow()
@@ -109,11 +109,11 @@ private MethodSpec generateToDynamoDbItemsMethod(String className, ClassName dom
                         ClassName.get(String.class),
                         attributeValue)))
                 .addParameter(ParameterizedTypeName.get(ClassName.get(List.class), domainClass), "objects")
-                .addJavadoc("Convenience method to convert a list of domain objects to DynamoDB items.\\n")
-                .addJavadoc("Useful for batch operations like batchWriteItem.\\n")
-                .addJavadoc("\\n")
-                .addJavadoc("@param objects List of $L objects to convert\\n", className)
-                .addJavadoc("@return List of DynamoDB items (Map<String, AttributeValue>), filtering out any null results\\n")
+                .addJavadoc("Convenience method to convert a list of domain objects to DynamoDB items.\n")
+                .addJavadoc("Useful for batch operations like batchWriteItem.\n")
+                .addJavadoc("\n")
+                .addJavadoc("@param objects List of $L objects to convert\n", className)
+                .addJavadoc("@return List of DynamoDB items (Map<String, AttributeValue>), filtering out any null results\n")
                 .beginControlFlow("if (objects == null || objects.isEmpty())")
                 .addStatement("return new $T<>()", ClassName.get("java.util", "ArrayList"))
                 .endControlFlow()