Fix: Remove unnecessary process substitution in analyze_time_series()

Line 1644: Changed from process substitution to direct file input
- From: }' "$TEMP_DIR/attack_vectors_raw.txt" <(cat "$TEMP_DIR/parsed_logs.txt") | sort
- To: }' "$TEMP_DIR/attack_vectors_raw.txt" "$TEMP_DIR/parsed_logs.txt" | sort
- Eliminates unnecessary pipe and subshell for efficiency

This is the final efficiency improvement in the series of bot-analyzer fixes.

modules/security/bot-analyzer.sh

@@ -1641,7 +1641,7 @@ analyze_time_series() {
                 hour = ts[4]
                 print hour
             }
-        }' "$TEMP_DIR/attack_vectors_raw.txt" <(cat "$TEMP_DIR/parsed_logs.txt") | sort | uniq -c > "$TEMP_DIR/hourly_attack_traffic.txt"
+        }' "$TEMP_DIR/attack_vectors_raw.txt" "$TEMP_DIR/parsed_logs.txt" | sort | uniq -c > "$TEMP_DIR/hourly_attack_traffic.txt"
     fi
 
     print_success "Time-series analysis complete"