Improve robustness of client solve time metric recording

Author: Fabinatix97

captchaservice-backend/src/main/java/de/muenchen/captchaservice/service/captcha/CaptchaService.java

@@ -7,6 +7,7 @@
 import de.muenchen.captchaservice.entity.InvalidatedPayload;
 import de.muenchen.captchaservice.repository.InvalidatedPayloadRepository;
 import de.muenchen.captchaservice.service.difficulty.DifficultyService;
+import de.muenchen.captchaservice.service.metrics.MetricsService;
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import lombok.extern.slf4j.Slf4j;
 import org.altcha.altcha.Altcha;

captchaservice-backend/src/main/java/de/muenchen/captchaservice/service/captcha/MetricsService.java renamed to captchaservice-backend/src/main/java/de/muenchen/captchaservice/service/metrics/MetricsService.java

@@ -1,4 +1,4 @@
-package de.muenchen.captchaservice.service.captcha;
+package de.muenchen.captchaservice.service.metrics;
 
 import de.muenchen.captchaservice.data.SourceAddress;
 import de.muenchen.captchaservice.repository.CaptchaRequestRepository;
@@ -57,8 +57,8 @@ public void recordVerifySuccess(String siteKey, SourceAddress sourceAddress) {
                 .increment();
     }
 
-    public void recordClientSolveTime(String siteKey, SourceAddress sourceAddress, long solveTime) {
-        if (solveTime <= 0) {
+    public void recordClientSolveTime(String siteKey, SourceAddress sourceAddress, Long solveTime) {
+        if (solveTime == null || solveTime < 0) {
             log.warn("Invalid solve time value: {} for site: {}", solveTime, sanitizeForLog(siteKey));
             return;
         }