add Film observability with trace id and metrics (#44)

* add Film observability with trace id and metrics

* test: provide meter registry in FilmServiceTest

src/test/kotlin/com/project/movienight/application/services/FilmServiceTest.kt

@@ -8,6 +8,7 @@ import com.project.movienight.config.FilmServiceProperties
 import com.project.movienight.domain.exception.BlockedValueException
 import com.project.movienight.domain.exception.EntityNotFoundException
 import com.project.movienight.domain.model.Film
+import io.micrometer.core.instrument.simple.SimpleMeterRegistry
 import io.mockk.every
 import io.mockk.justRun
 import io.mockk.mockk
@@ -23,6 +24,7 @@ class FilmServiceTest {
     private lateinit var filmRepository: FilmRepositoryPort
     private lateinit var idGenerator: IdGenerator
     private lateinit var filmConfig: FilmServiceProperties
+    private lateinit var meterRegistry: SimpleMeterRegistry
     private lateinit var filmService: FilmService
 
     @BeforeEach
@@ -30,7 +32,8 @@ class FilmServiceTest {
         filmRepository = mockk()
         idGenerator = mockk()
         filmConfig = mockk()
-        filmService = FilmService(filmRepository, idGenerator, filmConfig)
+        meterRegistry = SimpleMeterRegistry()
+        filmService = FilmService(filmRepository, idGenerator, filmConfig, meterRegistry)
     }
 
     @Test