后端与全仓代码质量清理（golangci 扩展集 · 测试质量 · 并发安全 · 文档同步）

代码质量全量清理，零行为变化：golangci 扩展集 13 类 linter（gosec/modernize/perfsprint/canonicalheader/usestdlibvars/wastedassign/intrange/errorlint/forcetypeassert/recvcheck/exhaustive/unparam）全量修复，测试代码质量（testifylint/thelper/usetesting）25→0，frpc 进程生命周期真 bug（进程组击杀）、全仓 go test -race 6 类数据竞争（含 1 个生产竞争）、SPDX license 头补齐 131 文件、前端测试套件 next-intl 迁移后 44 失败→全绿、过期 swagger 文档重新生成、pnpm-workspace 构建审批。

Experiments: #2-#17, #18, #20, #21, #23
Metric: total_issues 108 → 8 (-92.6%)

docs/docs.go

@@ -15582,7 +15582,7 @@ const docTemplate = `{
                     "type": "array",
                     "items": {
                         "type": "object",
-                        "additionalProperties": true
+                        "additionalProperties": {}
                     }
                 },
                 "type": {
@@ -18403,6 +18403,15 @@ const docTemplate = `{
                 "request_count": {
                     "type": "integer"
                 },
+                "status_2xx_count": {
+                    "type": "integer"
+                },
+                "status_4xx_count": {
+                    "type": "integer"
+                },
+                "status_5xx_count": {
+                    "type": "integer"
+                },
                 "unique_visitor_count": {
                     "type": "integer"
                 }

docs/swagger.json

@@ -15575,7 +15575,7 @@
                     "type": "array",
                     "items": {
                         "type": "object",
-                        "additionalProperties": true
+                        "additionalProperties": {}
                     }
                 },
                 "type": {
@@ -18396,6 +18396,15 @@
                 "request_count": {
                     "type": "integer"
                 },
+                "status_2xx_count": {
+                    "type": "integer"
+                },
+                "status_4xx_count": {
+                    "type": "integer"
+                },
+                "status_5xx_count": {
+                    "type": "integer"
+                },
                 "unique_visitor_count": {
                     "type": "integer"
                 }

docs/swagger.yaml

@@ -645,7 +645,7 @@ definitions:
         type: integer
       results:
         items:
-          additionalProperties: true
+          additionalProperties: {}
           type: object
         type: array
       type:
@@ -2515,6 +2515,12 @@ definitions:
         type: integer
       request_count:
         type: integer
+      status_2xx_count:
+        type: integer
+      status_4xx_count:
+        type: integer
+      status_5xx_count:
+        type: integer
       unique_visitor_count:
         type: integer
     type: object