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>

cli/processor_processing.go

@@ -97,4 +97,4 @@ func (p *Processor) createOutputFile() (*os.File, error) {
 		return nil, utils.WrapError(err, utils.ErrorTypeIO, utils.CodeIOFileCreate, "failed to create output file").WithFilePath(p.flags.Destination)
 	}
 	return outFile, nil
-}
+}