feat(api): Protokollzeile je Anfrage und je Nextcloud-Pruefung im Docker-Log

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

apps/api/src/nextcloud-status/nextcloud-status.service.ts

@@ -219,6 +219,7 @@ export class NextcloudStatusService {
     });
     if (!existing) throw new NotFoundException('Cloud nicht gefunden');
 
+    const startedAt = Date.now();
     const result = await fetchNextcloudStatus(existing.baseUrl);
     const now = new Date();
     const plan = planStatusWrite(existing.consecutiveFailures, result, now);
@@ -228,6 +229,12 @@ export class NextcloudStatusService {
       select: { ...PUBLIC_SELECT, alertState: true },
     });
     const view = this.toView(updated as PublicRow, await this.release.getReference());
+    const outcome = result.reachable
+      ? `Version ${result.versionString ?? '?'}${result.maintenance ? ', Wartungsmodus' : ''}`
+      : `Fehler ${result.errorKind}${result.errorDetail ? ` (${result.errorDetail})` : ''}`;
+    this.logger.log(
+      `Pruefung "${updated.customerName}" ${existing.baseUrl}: ${outcome}, Ampel ${view.rating.level}, ${Date.now() - startedAt} ms`,
+    );
     try {
       await this.alerts.evaluateAfterCheck(
         tenantId,