fix: bk_emit_resultでFOM値を常に小数3桁に正規化

[code:genesis-nonbonded-kernels]

Author: yoshifuminakamura

scripts/bk_functions.sh

@@ -125,12 +125,8 @@ bk_emit_result() {
       ;;
   esac
 
-  # Normalize scientific notation (e.g. 3.64E+01 -> 36.400) to plain decimal
-  case "$_bk_fom" in
-    *[eE]*)
-      _bk_fom=$(awk "BEGIN {printf \"%.6g\", $_bk_fom}")
-      ;;
-  esac
+  # Normalize FOM to 3 decimal places (also handles scientific notation)
+  _bk_fom=$(awk "BEGIN {printf \"%.3f\", $_bk_fom}")
 
   # Build output line
   _bk_output="FOM:${_bk_fom}"