Fix debug log capture - separate stdout and stderr streams

Fixed issue where debug logs and network traffic logs were not appearing in CI artifacts:

**Problem:** The workflow was redirecting both stdout and stderr to serial.log
using `2>&1`, which mixed all wokwi-cli diagnostic output (including debug logs
and network traffic) into the serial output file. This prevented separate capture
of debug information.

**Solution:**
1. **Separate output streams**: Changed redirect from `2>&1` to `2>logs/wokwi.log`
   - stdout (serial output) → logs/serial.log
   - stderr (CLI diagnostics, debug logs, network traffic) → logs/wokwi.log

2. **Display debug logs**: Added section to show wokwi.log content when server is ready
   - Shows last 100 lines of debug output including network traffic logs
   - Helps verify that debug logging is working correctly

3. **Restore PATH export**: Re-added PATH configuration for wokwi-cli

**Result:** Debug logs and network traffic will now be properly captured in
logs/wokwi.log and included in CI artifacts, enabling diagnosis of AsyncWebServer
connection issues.

Co-authored-by: softhack007 <91616163+softhack007@users.noreply.github.com>

Author: Copilot

.github/workflows/wokwi-test.yml

@@ -208,10 +208,13 @@ jobs:
           # Export the token so it's available to child processes
           export WOKWI_CLI_TOKEN
           
+          # Add PATH for wokwi-cli
+          export PATH="$HOME/.wokwi-ci/bin:$PATH"
+          
           # Start simulator in background with a 90 second timeout
-          # Wokwi CLI outputs to stderr, serial output goes to stdout
-          ## WOKWI_TIMEOUT=300 ./run-simulator.sh >logs/serial.log 2>&1 &
-          WOKWI_TIMEOUT=90 ./run-simulator.sh >logs/serial.log 2>&1 &
+          # Serial output (stdout) goes to serial.log
+          # Wokwi CLI diagnostics (stderr) including debug logs go to wokwi.log
+          WOKWI_TIMEOUT=90 ./run-simulator.sh >logs/serial.log 2>logs/wokwi.log &
           WOKWI_PID=$!
           echo "WOKWI_PID=$WOKWI_PID" >> $GITHUB_ENV
           echo "Started Wokwi simulator with PID $WOKWI_PID"
@@ -261,6 +264,9 @@ jobs:
           echo ""
           echo "=== First 50 lines of Serial output ==="
           head -50 logs/serial.log || true
+          echo ""
+          echo "=== Wokwi CLI debug log (network traffic) ==="
+          tail -100 logs/wokwi.log || echo "No wokwi.log available"
 
       - name: Run Playwright tests
         run: npm run test:wokwi