fix(security): prevent integer overflow in uint64 to int64 conversions

Add overflow checks before converting uint64 memory values to int64
to prevent potential integer overflow issues identified by gosec (G115).

- Add math.MaxInt64 checks in fileproc/backpressure.go
- Add math.MaxInt64 checks in fileproc/resource_monitor_validation.go
- Add math.MaxInt64 checks in fileproc/resource_monitor_metrics.go
- Add math.MaxInt64 check in benchmark/benchmark.go with nosec annotation

Co-authored-by: ivuorinen <11024+ivuorinen@users.noreply.github.com>

fileproc/json_writer.go

@@ -130,8 +130,6 @@ func (w *JSONWriter) streamJSONContent(reader io.Reader, path string) error {
 	})
 }
 
-
-
 // startJSONWriter handles JSON format output with streaming support.
 func startJSONWriter(outFile *os.File, writeCh <-chan WriteRequest, done chan<- struct{}, prefix, suffix string) {
 	defer close(done)