Fix production DB driver issue and root path 500 error

- Removed hardcoded `driver-class-name` from `application.yaml` to enable Spring Boot's driver auto-detection, fixing the startup failure in production where H2 driver was being used with a PostgreSQL URL.
- Updated `ApiExceptionHandler` to handle `NoResourceFoundException`, ensuring that unmapped paths (like `/`) return a 404 Not Found response instead of a 500 Internal Server Error.
- Added `NotFoundControllerTest` to verify the fix.

Co-authored-by: devitq <118541411+devitq@users.noreply.github.com>

src/main/kotlin/com/project/movienight/adapters/web/ApiExceptionHandler.kt

@@ -11,20 +11,21 @@ import org.springframework.web.bind.MethodArgumentNotValidException
 import org.springframework.web.bind.annotation.ExceptionHandler
 import org.springframework.web.bind.annotation.ResponseStatus
 import org.springframework.web.bind.annotation.RestControllerAdvice
+import org.springframework.web.servlet.resource.NoResourceFoundException
 import org.springframework.web.server.ResponseStatusException
 
 @RestControllerAdvice
 class ApiExceptionHandler {
     private val log = LoggerFactory.getLogger(javaClass)
 
-    @ExceptionHandler(EntityNotFoundException::class)
+    @ExceptionHandler(EntityNotFoundException::class, NoResourceFoundException::class)
     @ResponseStatus(HttpStatus.NOT_FOUND)
-    fun handleNotFound(exception: EntityNotFoundException): ErrorResponse {
+    fun handleNotFound(exception: Exception): ErrorResponse {
         val traceId = currentTraceId()
-        log.warn("Entity not found: traceId='{}', message='{}'", traceId, exception.message)
+        log.warn("Resource not found: traceId='{}', message='{}'", traceId, exception.message)
 
         return ErrorResponse(
-            message = exception.message ?: "Entity not found",
+            message = exception.message ?: "Resource not found",
             traceId = traceId,
         )
     }

src/main/resources/application.yaml

@@ -7,7 +7,6 @@ spring:
     url: ${SPRING_DATASOURCE_URL:jdbc:h2:mem:movienight;MODE=PostgreSQL;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE}
     username: ${SPRING_DATASOURCE_USERNAME:sa}
     password: ${SPRING_DATASOURCE_PASSWORD:}
-    driver-class-name: ${SPRING_DATASOURCE_DRIVER_CLASS_NAME:org.h2.Driver}
     hikari:
       maximum-pool-size: ${SPRING_DATASOURCE_HIKARI_MAXIMUM_POOL_SIZE:20}
       minimum-idle: ${SPRING_DATASOURCE_HIKARI_MINIMUM_IDLE:5}

src/test/kotlin/com/project/movienight/controllers/NotFoundControllerTest.kt

@@ -0,0 +1,35 @@
+package com.project.movienight.controllers
+
+import org.junit.jupiter.api.Test
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc
+import org.springframework.boot.test.context.SpringBootTest
+import org.springframework.test.web.servlet.MockMvc
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get
+import org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath
+import org.springframework.test.web.servlet.result.MockMvcResultMatchers.status
+
+@SpringBootTest
+@AutoConfigureMockMvc(addFilters = false)
+class NotFoundControllerTest {
+    @Autowired
+    private lateinit var mockMvc: MockMvc
+
+    @Test
+    fun `requesting non-existent path should return 404 JSON response`() {
+        mockMvc
+            .perform(get("/non-existent-path"))
+            .andExpect(status().isNotFound)
+            .andExpect(jsonPath("$.message").exists())
+            .andExpect(jsonPath("$.traceId").exists())
+    }
+
+    @Test
+    fun `requesting root path should return 404 JSON response`() {
+        mockMvc
+            .perform(get("/"))
+            .andExpect(status().isNotFound)
+            .andExpect(jsonPath("$.message").exists())
+            .andExpect(jsonPath("$.traceId").exists())
+    }
+}