feat: move all remaining inline logic from routers to services (Tier 2)

backend/app/services/worklog_service.py

@@ -8,6 +8,7 @@ from uuid import UUID
 
 from sqlalchemy.orm import Session
 
+from app.domain.errors import EntityNotFoundError
 from app.models.worklog import Worklog
 
 logger = logging.getLogger(__name__)
@@ -43,6 +44,14 @@ def create_worklog(
     return wl
 
 
+def get_worklog_or_raise(db: Session, worklog_id: UUID) -> Worklog:
+    """Get a worklog by ID or raise EntityNotFoundError."""
+    wl = db.query(Worklog).filter(Worklog.id == worklog_id).first()
+    if not wl:
+        raise EntityNotFoundError("Worklog", str(worklog_id))
+    return wl
+
+
 def list_worklogs(
     db: Session,
     *,