Also publish number of Tahoe Incident Reports

Fixes privatestorageops#287

nixos/modules/monitoring/exporters/tahoe.nix

@@ -67,6 +67,9 @@ in {
           NUM_CORRUPTION_ADVISORIES=$(find /storage/corruption-advisories/ -type f | wc -l)
           echo "tahoe_corruption_advisories_total $NUM_CORRUPTION_ADVISORIES" > "${cfg.outFile}.tmp"
 
+          NUM_INCIDENT_REPORTS=$(find /var/db/tahoe-lafs/storage/logs/incidents/ -type f | wc -l)
+          echo "tahoe_incident_reports_total $NUM_INCIDENT_REPORTS" >> "${cfg.outFile}.tmp"
+
           curl --silent --show-error --fail-with-body "${cfg.scrapeEndpoint}" >> "${cfg.outFile}.tmp"
           mv "${cfg.outFile}.tmp" "${cfg.outFile}"
         '';