feat(server-go): AI 巡检闭环后端（inspection_records + /inspections 幂等接口）

server-go/internal/handler/knowledge_image_test.go

@@ -64,3 +64,16 @@ func TestBuildImageKey(t *testing.T) {
 		t.Errorf("key 应包含日期与随机部分: %s", key)
 	}
 }
+
+func TestBuildObjectKeyPrefix(t *testing.T) {
+	key, ext, err := buildObjectKey("inspections", "a.jpg")
+	if err != nil {
+		t.Fatalf("buildObjectKey 失败: %v", err)
+	}
+	if !strings.HasPrefix(key, "inspections/") {
+		t.Errorf("key 应以 inspections/ 开头: %s", key)
+	}
+	if !strings.HasSuffix(key, ".jpg") || ext != ".jpg" {
+		t.Errorf("key/ext 应以 .jpg 结尾: %s / %s", key, ext)
+	}
+}