Rename testdata log files for clarity

Renamed sample log input and expected output files in testdata to use a consistent 'log-*-input.txt' and 'log-*-want.txt' naming scheme. Updated references in log_test.go to match the new file names for improved clarity and maintainability.

pkg/cmd/agent-task/shared/log_test.go

@@ -19,13 +19,13 @@ func TestFollow(t *testing.T) {
 	}{
 		{
 			name: "sample log 1",
-			log:  "testdata/sample-log-1.txt",
-			want: "testdata/sample-log-1.want.txt",
+			log:  "testdata/log-1-input.txt",
+			want: "testdata/log-1-want.txt",
 		},
 		{
 			name: "sample log 2",
-			log:  "testdata/sample-log-2.txt",
-			want: "testdata/sample-log-2.want.txt",
+			log:  "testdata/log-2-input.txt",
+			want: "testdata/log-2-want.txt",
 		},
 	}