Apply suggestions from code review

Addresses:
-https://github.com/louislam/uptime-kuma/pull/4717#discussion_r1589805237
-https://github.com/louislam/uptime-kuma/pull/4717#discussion_r1589806199
-https://github.com/louislam/uptime-kuma/pull/4717#discussion_r1589853470
-https://github.com/louislam/uptime-kuma/pull/4717#discussion_r1589854032

server/monitor-types/snmp.js

@@ -25,9 +25,7 @@ class SNMPMonitorType extends MonitorType {
 
             // Handle errors during session creation
             session.on("error", (error) => {
-                heartbeat.status = DOWN;
-                heartbeat.msg = `SNMP: Error creating SNMP session: ${error.message}`;
-                log.debug("monitor", heartbeat.msg);
+                throw new Error(`Error creating SNMP session: ${error.message}`);
             });
 
             const varbinds = await new Promise((resolve, reject) => {
@@ -35,11 +33,11 @@ class SNMPMonitorType extends MonitorType {
                     if (error) {
                         reject(error);
                     } else {
-                        log.debug("monitor", `SNMP: Received varbinds (Type=${getKey(snmp.ObjectType, varbinds[0].type)}): ${varbinds[0].value}`);
                         resolve(varbinds);
                     }
                 });
             });
+            log.debug("monitor", `SNMP: Received varbinds (Type=${getKey(snmp.ObjectType, varbinds[0].type)}): ${varbinds[0].value}`);
 
             // Verify if any varbinds were returned from the SNMP session or if the varbind type indicates a non-existent instance.
             // The `getKey` method retrieves the key associated with the varbind type from the snmp.ObjectType object.

src/pages/EditMonitor.vue

@@ -1320,11 +1320,13 @@ message HealthCheckResponse {
                 }
             }
 
-            // Set default timeout
+            // Set a default timeout of 1 second for SNMP monitors when querying a single OID.
+            // Since we're only querying a single OID, a shorter timeout is sufficient to ensure timely responses
+            // without unnecessary delays. This helps keep the monitoring process lightweight and efficient.
             if (this.monitor.type === "snmp") {
                 this.monitor.timeout = 1;
             } else {
-                this.monitor.timeout = 48;
+                this.monitor.timeout = 48; // Default timeout for other monitor types
             }
 
             // Set default SNMP version