feat(iit): harden QC pipeline consistency and release artifacts

Implement IIT quality workflow hardening across eQuery deduplication, guard metadata validation, timeline/readability improvements, and chat evidence fallbacks, then synchronize release and development documentation for deployment handoff.

Includes migration/scripts for open eQuery dedupe guards, orchestration/status semantics, report/tool readability fixes, and updated module status plus deployment checklist.

Made-with: Cursor

backend/prisma/migrations/20260308_add_iit_equery_open_dedupe_guard/migration.sql

@@ -0,0 +1,48 @@
+-- 1) 先收敛历史 open 重复，避免唯一索引创建失败
+WITH ranked AS (
+  SELECT
+    id,
+    ROW_NUMBER() OVER (
+      PARTITION BY
+        project_id,
+        record_id,
+        COALESCE(event_id, ''),
+        COALESCE(category, '')
+      ORDER BY
+        CASE status
+          WHEN 'reviewing' THEN 4
+          WHEN 'responded' THEN 3
+          WHEN 'reopened' THEN 2
+          WHEN 'pending' THEN 1
+          ELSE 0
+        END DESC,
+        updated_at DESC NULLS LAST,
+        created_at DESC NULLS LAST,
+        id DESC
+    ) AS rn
+  FROM iit_schema.equery
+  WHERE status IN ('pending', 'responded', 'reviewing', 'reopened')
+)
+UPDATE iit_schema.equery e
+SET
+  status = 'auto_closed',
+  closed_at = COALESCE(e.closed_at, NOW()),
+  closed_by = COALESCE(e.closed_by, 'system_dedupe_migration'),
+  resolution = COALESCE(
+    NULLIF(e.resolution, ''),
+    '自动去重收敛：同一受试者/事件/规则已存在未关闭 eQuery'
+  ),
+  updated_at = NOW()
+FROM ranked r
+WHERE e.id = r.id
+  AND r.rn > 1;
+
+-- 2) 为 open 集合建立唯一去重键，防止未来重复写入
+CREATE UNIQUE INDEX IF NOT EXISTS uq_iit_equery_open_dedupe_key
+ON iit_schema.equery (
+  project_id,
+  record_id,
+  (COALESCE(event_id, '')),
+  (COALESCE(category, ''))
+)
+WHERE status IN ('pending', 'responded', 'reviewing', 'reopened');