Add MPI+OpenMP hybrid parallelism (48 ranks x 2 threads) for full 96-core utilization

Enable OpenMP threading in finite-difference kernels (diff_new, diff_new_sh, diff_newwb,
lopsidediff, kodiss, kodiss_sh) with collapse(3) directives on 36 triple-nested loops.
Update build flags (-qopenmp), MPI process binding, and runtime configuration.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

AMSS_NCKU_source/kodiss_sh.f90

@@ -369,11 +369,12 @@ integer, parameter :: NO_SYMM=0, EQ_SYMM=1, OCTANT=2
 
   call symmetry_stbd(3,ex,f,fh,SoA)
 
+  !$omp parallel do collapse(3) private(i,j,k) if(ex(1)*ex(2)*ex(3) > 4096)
   do k=1,ex(3)
   do j=1,ex(2)
   do i=1,ex(1)
 
-#if 1 
+#if 1
   if(i-3 >= imin .and. i+3 <= imax .and. &
      j-3 >= jmin .and. j+3 <= jmax .and. &
      k-3 >= kmin .and. k+3 <= kmax) then