Add zero-padding to iteration numbers in result filenames

[sayalibhavsar]

Description

Adds zero-padding to CoreMark-PRO iteration result filenames to ensure proper numerical sorting when running 10 or more iterations.

Before/After Comparison

Before: Files sorted as run_1, run_10, run_11, ..., run_2, run_3 (lexicographic order).
After: Files sorted as run_01, run_02, ..., run_10, run_11, run_12 (numerical order with minimal zero-padding).

Clerical Stuff

This closes #37

Relates to JIRA: RPOPC-287

[sayalibhavsar]

Expected Results Summary

Total Iterations	Padding Width	File 1	File 5	File 9	File 10	File 99	File 100
9	None	1	5	9	–	–	–
10	2 digits	01	05	09	10	–	–
44	2 digits	01	05	09	10	–	–
99	2 digits	01	05	09	10	99	–
100	3 digits	001	005	009	010	099	100
150	3 digits	001	005	009	010	099	100
1000	4 digits	0001	0005	0009	0010	0099	0100

[sayalibhavsar]

sbhavsar@sbhavsar-thinkpadp16vgen1:~/coremark_pro-wrapper$ format_iteration_number() { local iter=$1; local total=$2; if [ $total -lt 10 ]; then echo $iter; return; fi; local digits=${#total}; printf "%0${digits}d" $iter; }

echo "Test 1: $(format_iteration_number 5 150) (expected: 005)"
echo "Test 2: $(format_iteration_number 5 44) (expected: 05)"
echo "Test 3: $(format_iteration_number 5 9) (expected: 5)"
echo "Test 4: $(format_iteration_number 99 150) (expected: 099)"
echo "Test 5: $(format_iteration_number 150 150) (expected: 150)"

Test 1: 005 (expected: 005)
Test 2: 05 (expected: 05)
Test 3: 5 (expected: 5)
Test 4: 099 (expected: 099)
Test 5: 150 (expected: 150)

the function works correctly. quick sanity check to verify the zero-padding logic is working as expected

[kdvalin]

LGTM

[dvalinrh]

LGTM