feat(backend): Don't consider /health requests in security filter

legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/security/JwtUserSyncFilter.kt

@@ -17,6 +17,11 @@ import org.springframework.web.filter.OncePerRequestFilter
 class JwtUserSyncFilter(
     val userService: UserService,
 ) : OncePerRequestFilter() {
+
+    override fun shouldNotFilter(request: HttpServletRequest): Boolean {
+        return request.requestURI.startsWith("/actuator/health")
+    }
+
     override fun doFilterInternal(
         request: HttpServletRequest,
         response: HttpServletResponse,