doc: add comment on infinite loop possibility

Author: metacosm

backend/src/main/java/net/laprun/sustainability/power/sensors/macos/powermetrics/MacOSPowermetricsSensor.java

@@ -151,6 +151,8 @@ Measures extractPowerMeasure(InputStream powerMeasureInput, Long tick) {
                             pidsToProcess.remove(pid);
                             break;
                         }
+
+                        // todo? if pid is not found, this will loop forever and we should break if ALL_TASKS is reached without draining the pids to process
                     }
                     continue;
                 }