feat: sync latest ARR implementation

Dockerfile

@@ -9,9 +9,7 @@ WORKDIR /app
 
 COPY requirements*.txt ./
 RUN python -m pip install --upgrade pip \
-    && python -m pip install \
-        --requirement requirements.txt \
-        --requirement requirements-arr-mcp.txt
+    && python -m pip install --requirement requirements.txt
 
 RUN groupadd --system arr \
     && useradd --system --gid arr --create-home arr
@@ -23,6 +21,6 @@ RUN mkdir -p /app/runtime /app/outputs \
 
 USER arr
 
-EXPOSE 8765 8890
+EXPOSE 8765
 
 CMD ["python", "-m", "arr_web.run", "--host", "0.0.0.0", "--port", "8765", "--enable-processing"]