fix: count per-seq missing rows in validator summary

Per-seq MISSING_OLR/EXTRA_OLR branches incremented total_mismatches
but not total_missing_olr/total_missing_lm, under-reporting in the
summary output.

Author: rophy

tests/dbz-twin/rac/validator.py

@@ -268,6 +268,7 @@ def main():
                     olr_r = olr_by_seq.get(seq)
 
                     if lm_r and not olr_r:
+                        total_missing_olr += 1
                         if is_lob:
                             total_lob_known += 1
                         else:
@@ -279,6 +280,7 @@ def main():
                         continue
 
                     if olr_r and not lm_r:
+                        total_missing_lm += 1
                         if is_lob:
                             total_lob_known += 1
                         else: