feat: 重构测试框架并优化代码结构

refactor(tests): 将e2e_tests迁移到tests_suite和api_integration_tests
style: 为Java类添加文档注释
docs: 更新.gitignore和配置文件
test: 添加性能测试和Playwright测试脚本
chore: 清理旧测试文件和配置

tests_suite/tests/performance/config.json

@@ -0,0 +1,36 @@
+{
+  "scenarios": {
+    "baseline": {
+      "executor": "constant-vus",
+      "vus": 10,
+      "duration": "30s"
+    },
+    "stress_test": {
+      "executor": "ramping-vus",
+      "startVUs": 10,
+      "stages": [
+        { "duration": "1m", "target": 50 },
+        { "duration": "2m", "target": 100 },
+        { "duration": "1m", "target": 50 },
+        { "duration": "1m", "target": 10 }
+      ]
+    },
+    "spike_test": {
+      "executor": "ramping-vus",
+      "startVUs": 10,
+      "stages": [
+        { "duration": "30s", "target": 10 },
+        { "duration": "10s", "target": 200 },
+        { "duration": "30s", "target": 10 }
+      ]
+    }
+  },
+  "thresholds": {
+    "http_req_duration": [
+      { "target": "p(95)<500", "abortOnFail": true }
+    ],
+    "http_req_failed": [
+      { "target": "rate<0.05", "abortOnFail": true }
+    ]
+  }
+}