fix: resolve subshell bug in whitelist-check and reduce output noise (#1231)

- Remove pipe before while loop to fix subshell issue where violation
  arrays were always empty (violations detected but never reported)
- Replace per-file "Checking:" output with progress dots every 10 files
- Add summary showing total files checked

.github/scripts/file-whitelist-check.sh

@@ -82,6 +82,7 @@ fi
 echo "🔍 Running comprehensive security checks..."
 echo ""
 
+FILES_CHECKED=0
 WHITELIST_VIOLATIONS=()
 LARGE_FILES=()
 SECRET_VIOLATIONS=()
@@ -96,7 +97,7 @@ HARDCODED_IP_VIOLATIONS=()
 SUSPICIOUS_FILETYPE_VIOLATIONS=()
 
 # Use improved file processing that handles spaces and special characters
-printf '%s\n' "$CHANGED_FILES" | while IFS= read -r file; do
+while IFS= read -r file; do
 [ -z "$file" ] && continue
 
 # Skip deleted files
@@ -104,7 +105,10 @@ if [ ! -f "$file" ]; then
 continue
 fi
 
-echo "Checking: $file"
+FILES_CHECKED=$((FILES_CHECKED + 1))
+if [ $((FILES_CHECKED % 10)) -eq 0 ]; then
+printf "."
+fi
 
 # 1. Whitelist check
 ALLOWED=false
@@ -310,6 +314,10 @@ fi
 fi
 done <<< "$CHANGED_FILES"
 
+echo ""
+echo "✓ Checked $FILES_CHECKED files"
+echo ""
+
 # Report all violations with detailed explanations
 echo "📊 Security scan completed. Analyzing results..."
 echo "📋 Summary of findings:"