emit recovery signal for MonitoringServiceKey.GENERAL and route EDQS I/O errors correctly

Two related fixes for a stuck-open 'Monitoring' entry in the incident header:

1. serviceIsOk(GENERAL) is now called when a monitoring cycle completes
   successfully. Previously GENERAL could only accumulate failures (via the
   outer Throwable catch), with no complementary recovery, so once the
   catch-all fired the service stayed red forever.
2. checkEdqs() is now wrapped in its own try/catch that reports any
   non-ServiceFailureException failures under EDQS rather than GENERAL.
   Connection/read timeouts hitting /api/entitiesQuery/find previously
   propagated unwrapped and were bucketed as GENERAL, which hid the fact
   that EDQS was the failing component.

monitoring/src/main/java/org/thingsboard/monitoring/service/BaseMonitoringService.java

@@ -155,13 +155,22 @@ public abstract class BaseMonitoringService<C extends MonitoringConfig<T>, T ext
             }
 
             if (checkEdqs) {
-                stopWatch.start();
-                checkEdqs();
-                reporter.reportLatency(Latencies.EDQS_QUERY, stopWatch.getTime());
-                reporter.serviceIsOk(MonitoredServiceKey.EDQS);
+                try {
+                    stopWatch.start();
+                    checkEdqs();
+                    reporter.reportLatency(Latencies.EDQS_QUERY, stopWatch.getTime());
+                    reporter.serviceIsOk(MonitoredServiceKey.EDQS);
+                } catch (ServiceFailureException e) {
+                    reporter.serviceFailure(e.getServiceKey(), e);
+                    return;
+                } catch (Exception e) {
+                    reporter.serviceFailure(MonitoredServiceKey.EDQS, e);
+                    return;
+                }
             }
 
             reporter.reportLatencies();
+            reporter.serviceIsOk(MonitoredServiceKey.GENERAL);
             log.debug("Finished {}", getName());
         } catch (ServiceFailureException e) {
             reporter.serviceFailure(e.getServiceKey(), e);