fix: capture and display ai-reviewer.sh error messages in workflow

Previously, when ai-reviewer.sh failed with exit code 1, the workflow
would immediately stop due to shell errexit (-e flag) without displaying
the actual error message. This made debugging failures very difficult.

Changes:
- Temporarily disable errexit with 'set +e' before running ai-reviewer.sh
- Capture both stdout and stderr with '2>&1' redirection
- Store the exit code separately for inspection
- Re-enable errexit with 'set -e' after capture
- Check exit code and display full error output if non-zero
- Include exit code in debug output for better troubleshooting

This fix ensures that when the AI reviewer fails, users will see the
actual error message (e.g., "Missing OPENROUTER_API_KEY", "Diff too large",
"API call failed") instead of just "Error: Process completed with exit code 1".

Author: LearningCircuit

.github/workflows/ai-code-reviewer.yml

@@ -46,15 +46,30 @@ jobs:
         run: |
           # Run the AI reviewer and save response to file
           echo "Running AI code review..."
-          AI_RESPONSE=$(cat diff.txt | bash ai-reviewer.sh)
+
+          # Temporarily disable errexit to capture errors properly
+          set +e
+          AI_RESPONSE=$(cat diff.txt | bash ai-reviewer.sh 2>&1)
+          EXIT_CODE=$?
+          set -e
 
           # Output raw response for debugging (only in debug mode)
           if [ "$DEBUG_MODE" = "true" ]; then
             echo "=== RAW AI RESPONSE FOR DEBUG ==="
+            echo "Exit code: $EXIT_CODE"
             echo "$AI_RESPONSE"
             echo "=== END RAW AI RESPONSE ==="
           fi
 
+          # Check if the script failed
+          if [ $EXIT_CODE -ne 0 ]; then
+            echo "❌ AI reviewer script failed with exit code $EXIT_CODE"
+            echo ""
+            echo "Error output:"
+            echo "$AI_RESPONSE"
+            exit 1
+          fi
+
           # Check if AI_RESPONSE is empty
           if [ -z "$AI_RESPONSE" ]; then
             echo "❌ AI response is empty"