updated DB query and build instructions

controller/.gitignore

@@ -4,6 +4,8 @@ bin/
 *.dll
 *.so
 *.dylib
+controller
+controller.exe
 
 # Test artifacts
 coverage.out

controller/internal/metrics/store.go

@@ -149,8 +149,8 @@ func (s *MetricsStore) QuerySystemMetrics(from, to time.Time, resolution int) ([
 		SELECT
 			(ts / ?) * ? AS bucket_ts,
 			AVG(cpu_percent),
-			AVG(mem_used_mb),
-			AVG(mem_total_mb),
+			ROUND(AVG(mem_used_mb)),
+			ROUND(AVG(mem_total_mb)),
 			AVG(temp_celsius),
 			AVG(load_avg_1),
 			AVG(load_avg_5),