fix: make AxhubSessionService optional to prevent Gateway crash

dap-was-lib/src/main/java/io/shinhanlife/dap/lib/mcp/McpRequestHeaderFilter.java

@@ -15,7 +15,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 @Component
 public class McpRequestHeaderFilter extends OncePerRequestFilter {
 
-    @Autowired
+    @Autowired(required = false)
     private AxhubSessionService sessionService;
 
     @Override
@@ -35,8 +35,8 @@ public class McpRequestHeaderFilter extends OncePerRequestFilter {
                 empNo,
                 request.getHeader("virtual-employee-no")));
                 
-        // Fetch session info via MCI using employee-no
-        if (empNo != null && !empNo.isEmpty()) {
+        // Fetch session info via MCI using employee-no (Only if sessionService is available, e.g. in Tool Pods)
+        if (sessionService != null && empNo != null && !empNo.isEmpty()) {
             SessionDto sessionDto = sessionService.fetchUserSession(empNo);
             if (sessionDto != null) {
                 // Set to request attribute so SessionUtil can find it