added Spring to support fastapi service

src/main/java/com/cs102/attendance/controller/FastApiCallerController.java

@@ -1,3 +1,4 @@
+// FastApiCallerController.java
 package com.cs102.attendance.controller;
 
 import org.springframework.web.bind.annotation.GetMapping;
@@ -8,7 +9,11 @@ import com.cs102.attendance.service.FastApiCallerService;
 @RestController
 public class FastApiCallerController {
 
-    private final FastApiCallerService fastApiCallerService = new FastApiCallerService();
+    private final FastApiCallerService fastApiCallerService;
+
+    public FastApiCallerController(FastApiCallerService fastApiCallerService) {
+        this.fastApiCallerService = fastApiCallerService;
+    }
 
     @GetMapping("/call-face-recognition")
     public String callFaceRecognition() {
@@ -19,4 +24,4 @@ public class FastApiCallerController {
             return "Error calling face-recognition API";
         }
     }
-}
+}

src/main/java/com/cs102/attendance/service/FastApiCallerService.java

@@ -1,3 +1,4 @@
+// FastApiCallerService.java
 package com.cs102.attendance.service;
 
 import java.net.URI;
@@ -5,9 +6,12 @@ import java.net.http.HttpClient;
 import java.net.http.HttpRequest;
 import java.net.http.HttpResponse;
 
+import org.springframework.stereotype.Service;
+
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
+@Service
 public class FastApiCallerService {
 
     private static final String FASTAPI_URL = "https://kevansoon-java-facerecognition-endpoint.hf.space/face-recognition";