修复 internal/apps/edge/observability/linux.go 的 2 个 gosec G115 整数溢出转换：helper 改为接收 int64 b，用 gosec 认可的饱和乘法模式（uint64 域乘积 + 上界比较），去掉原 //nolint:gosec，语义不变（Bsize 恒为正）。repo 自带 gate 首次全绿。

Result: {"status":"keep","total_issues":106,"golint_canonicalheader":8,"golint_errname":1,"golint_errorlint":12,"golint_forcetypeassert":3,"golint_gosec":0,"golint_intrange":3,"golint_modernize":37,"golint_nilnil":3,"golint_perfsprint":18,"golint_prealloc":3,"golint_recvcheck":7,"golint_usestdlibvars":3,"golint_wastedassign":7,"golint_total":105,"eslint_problems":1,"eslint_errors":0,"eslint_warnings":1,"tsc_errors":0,"measure_s":38}

.auto/log.jsonl

@@ -0,0 +1,2 @@
+{"type":"config","name":"前后端代码质量优化（符合最佳实践）","metricName":"total_issues","metricUnit":"","bestDirection":"lower"}
+{"run":1,"commit":"305d609","metric":108,"metrics":{"golint_canonicalheader":8,"golint_errname":1,"golint_errorlint":12,"golint_forcetypeassert":3,"golint_gosec":2,"golint_intrange":3,"golint_modernize":37,"golint_nilnil":3,"golint_perfsprint":18,"golint_prealloc":3,"golint_recvcheck":7,"golint_usestdlibvars":3,"golint_wastedassign":7,"golint_total":107,"eslint_problems":1,"eslint_errors":0,"eslint_warnings":1,"tsc_errors":0,"measure_s":36},"status":"checks_failed","description":"基线：总问题 108（golangci 107 + eslint 1）。checks 失败的唯一原因：repo 自带 golangci gate 有 2 个既有 gosec G115 问题（预期内，首次修复后即绿）。","timestamp":1786871594292,"segment":0,"confidence":null,"asi":{"hypothesis":"baseline","next_action_hint":"修复 internal/apps/edge/observability/linux.go 的 2 个 G115 gosec 问题后 checks.sh 才能通过；之后每次迭代即可正常 keep/discard"}}