服务器长跑不再堆积取消监听，数据库少走几趟。

报告工人的等待到点就摘掉取消监听。本地数据库缓存表结构，并把设置身份合成一条语句，对照通过后默认打开，写成 off 仍走原来的语句。交付、重算和限流的内存表会过期。登录读缓存默认关闭，要开再设 IDENTITY_SESSION_COOKIE_CACHE=on。

自测：tsc 通过，lint 0 error，点名测试 134 通过，test:db 开关关和开都只有已知的 13 条失败，往返 49 降到 32。

Co-Authored-By: Grok (agent loop)

deploy/.env.staging.identity.example

@@ -31,3 +31,11 @@ JYOTISH_DYNAMIC_RECTIFICATION_TOKEN=<independent-openssl-rand-base64-32-output>
 # these server-side values through env_file; they are not NEXT_PUBLIC values.
 PERSONAL_REPORT_ENABLED=true
 PERSONAL_REPORT_DAILY_LIMIT=5
+
+# Local Postgres adapter. Unset or on enables both. Exact off restores the
+# previous per-statement sequence. Measured default is on (2026-10-14).
+JYOTISHA_PG_METADATA_CACHE=on
+JYOTISHA_PG_MERGED_SESSION_SETUP=on
+# Ordinary session reads stay uncached unless this is exactly on. Password
+# change, account deletion, and admin routes bypass the cache. maxAge is 300s.
+#IDENTITY_SESSION_COOKIE_CACHE=off