feat: 发现处置状态扩展为 8 个

在 待处理/误报/忽略/已处理 基础上新增:
- in_progress 处理中(已受理、修复/验证中)
- confirmed 已确认(真实漏洞未修复)
- duplicate 重复
- risk_accepted 风险接受(确认存在但业务接受)

改动:db 常量 + ValidFindingStatus 白名单、schema 注释、status.ts 色板/文案、
types.ts 联合类型、两处下拉的 FINDING_STATUSES(下拉与状态筛选自动带出)。
状态无 CHECK 约束,旧库无需迁移。

web/src/app/(main)/function/findings/page.tsx

@@ -40,9 +40,13 @@ import type { Finding, FindingStats, FindingStatus, Severity } from "@/lib/types
 
 const FINDING_STATUSES: FindingStatus[] = [
   "pending",
+  "in_progress",
+  "confirmed",
+  "resolved",
   "false_positive",
   "ignored",
-  "resolved",
+  "duplicate",
+  "risk_accepted",
 ];
 
 const EMPTY_STATS: FindingStats = {

web/src/app/(main)/function/tasks/detail/_tabs/findings-tab.tsx

@@ -18,9 +18,13 @@ import type { Finding, FindingStatus } from "@/lib/types";
 
 const FINDING_STATUSES: FindingStatus[] = [
   "pending",
+  "in_progress",
+  "confirmed",
+  "resolved",
   "false_positive",
   "ignored",
-  "resolved",
+  "duplicate",
+  "risk_accepted",
 ];
 
 function Row({