Feat: add mcp self-host mode (#7157)

### What problem does this PR solve?

Add mcp self-host mode, a complement of #7084.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

docker/docker-compose.yml

@@ -15,6 +15,8 @@ services:
     #   - --mcp-port=9382
     #   - --mcp-base-url=http://127.0.0.1:9380
     #   - --mcp-script-path=/ragflow/mcp/server/server.py
+    #   - --mcp-mode=self-host
+    #   - --mcp--host-api-key="ragflow-xxxxxxx"
     container_name: ragflow-server
     ports:
       - ${SVR_HTTP_PORT}:9380

docker/entrypoint.sh

@@ -35,6 +35,8 @@ MCP_HOST="127.0.0.1"
 MCP_PORT=9382
 MCP_BASE_URL="http://127.0.0.1:9380"
 MCP_SCRIPT_PATH="/ragflow/mcp/server/server.py"
+MCP_MODE="self-host"
+MCP_HOST_API_KEY=""
 
 # -----------------------------------------------------------------------------
 # Host ID logic:
@@ -77,6 +79,14 @@ for arg in "$@"; do
       MCP_BASE_URL="${arg#*=}"
       shift
       ;;
+    --mcp-mode=*)
+      MCP_MODE="${arg#*=}"
+      shift
+      ;;
+    --mcp-host-api-key=*)
+      MCP_HOST_API_KEY="${arg#*=}"
+      shift
+      ;;
     --mcp-script-path=*)
       MCP_SCRIPT_PATH="${arg#*=}"
       shift
@@ -138,7 +148,9 @@ function start_mcp_server() {
     "$PY" "${MCP_SCRIPT_PATH}" \
         --host="${MCP_HOST}" \
         --port="${MCP_PORT}" \
-        --base_url="${MCP_BASE_URL}" &
+        --base_url="${MCP_BASE_URL}" \
+        --mode="${MCP_MODE}" \
+        --api_key="${MCP_HOST_API_KEY}" \ &
 }
 
 # -----------------------------------------------------------------------------