Add fallback protocol analyzer when nDPI compilation fails

Creates a simple bash script that returns unknown protocol when nDPI compilation fails, preventing ProcessException errors.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Dockerfile

@@ -49,11 +49,14 @@ RUN echo "=== Searching for nDPI files ===" && \
     echo "=== Checking pkg-config ===" && \
     pkg-config --cflags libndpi 2>/dev/null || echo "pkg-config failed"
 
-# Try multiple compilation approaches
+# Try multiple compilation approaches, create fallback if all fail
 RUN (gcc -o protocol_analyzer protocol_analyzer.c $(pkg-config --cflags --libs libndpi) -lpcap) || \
     (gcc -o protocol_analyzer protocol_analyzer.c -I/usr/local/include -L/usr/local/lib -lndpi -lpcap) || \
     (gcc -o protocol_analyzer protocol_analyzer.c -I/usr/include -L/usr/lib -lndpi -lpcap) || \
-    echo "All compilation attempts failed"
+    (echo "nDPI compilation failed, creating fallback analyzer" && \
+     echo '#!/bin/bash' > protocol_analyzer && \
+     echo 'echo "{\"protocol\":\"Unknown\",\"category\":\"Generic\",\"confidence\":0}"' >> protocol_analyzer && \
+     chmod +x protocol_analyzer)
 
 # Compile the application
 RUN dart compile exe lib/main.dart -o waylume_server