fix vector test flaky by generating SSH logs repeatedly

The test generated an SSH event only once, which could be missed if the
log watcher's streaming connection wasn't established yet. Generate SSH
events in a loop every 10 seconds so the watchers are guaranteed to
catch a matching log entry regardless of startup timing.

Signed-off-by: Paul Gaiduk <paulg@zededa.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: europaul

tests/vector/vector_test.go

@@ -340,14 +340,26 @@ func TestWorkingConfig(t *testing.T) {
 		}
 	}()
 
-	time.Sleep(5 * time.Second) // Give some time for the log watcher to start
-	steppy.AnnounceNext("generate logs from debug container")
-	cmd = "exit"
-	if _, err := eveNode.EveRunCommand(cmd); err != nil {
-		logFatalf("Failed to run ssh '%s': %v", cmd, err)
-	} else {
-		logInfof("SSH command '%s' executed successfully, logs should be generated", cmd)
-	}
+	steppy.AnnounceNext("generate logs from debug container repeatedly")
+	stopGenerating := make(chan struct{})
+	go func() {
+		cmd := "exit"
+		ticker := time.NewTicker(10 * time.Second)
+		defer ticker.Stop()
+		for {
+			if _, err := eveNode.EveRunCommand(cmd); err != nil {
+				logInfof("SSH command '%s' failed (may be transient): %v", cmd, err)
+			} else {
+				logInfof("SSH command '%s' executed successfully, logs should be generated", cmd)
+			}
+			select {
+			case <-stopGenerating:
+				return
+			case <-ticker.C:
+			}
+		}
+	}()
 
 	wg.Wait()
+	close(stopGenerating)
 }