Refactor codebase:

- Add Markdown documentation (`CLAUDE.md`) outlining the technical stack and project structure.
- Introduce Google Checkstyle (`google_custom_checks.xml`) for code formatting and validation.
- Rename `HomeController` to `UiController` for consistency.
- Replace package `repository` with `jpa` for clarity in data access layer.
- Add `logback.xml` for enhanced logging configuration.
- Refactor Javadoc generation logic in `JavadocService`.

pom.xml

@@ -95,6 +95,18 @@
 
     <build>
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <annotationProcessorPaths>
+                        <path>
+                            <groupId>org.projectlombok</groupId>
+                            <artifactId>lombok</artifactId>
+                        </path>
+                    </annotationProcessorPaths>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>