feat(backend): add sentry-spring-boot-starter-jakarta for GlitchTip error reporting

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/pom.xml

@@ -224,6 +224,13 @@
 				</exclusion>
 			</exclusions>
 		</dependency>
+
+		<!-- Sentry error reporting (GlitchTip-compatible) -->
+		<dependency>
+			<groupId>io.sentry</groupId>
+			<artifactId>sentry-spring-boot-starter-jakarta</artifactId>
+			<version>8.5.0</version>
+		</dependency>
 	</dependencies>
 
 

backend/src/main/resources/application.yaml

@@ -118,3 +118,12 @@ ocr:
   sender-model:
     activation-threshold: 100
     retrain-delta: 50
+
+sentry:
+  dsn: ${SENTRY_DSN:}
+  environment: ${SPRING_PROFILES_ACTIVE:dev}
+  traces-sample-rate: 1.0
+  send-default-pii: false
+  enable-tracing: true
+  ignored-exceptions-for-type:
+    - org.raddatz.familienarchiv.exception.DomainException

docker-compose.yml

@@ -147,6 +147,7 @@ services:
       SPRING_MAIL_PROPERTIES_MAIL_SMTP_STARTTLS_ENABLE: ${MAIL_STARTTLS_ENABLE:-false}
       APP_OCR_BASE_URL: http://ocr-service:8000
       APP_OCR_TRAINING_TOKEN: "${OCR_TRAINING_TOKEN:-}"
+      SENTRY_DSN: ${SENTRY_DSN:-}
       # Observability: send traces to Tempo inside archiv-net (OTLP gRPC port 4317)
       # Tempo is defined in docker-compose.observability.yml (future issue).
       # OTLP failures are non-fatal — backend starts cleanly without the observability stack.