Throttle platform SSO session checks to cut per-request auth latency.

Verify auth.ladill.com at most once every 90s; recommend Redis for session/cache in .env.example.

Co-authored-by: Cursor <cursoragent@cursor.com>

.env.example

@@ -17,6 +17,11 @@ DB_DATABASE=ladill_give
 DB_USERNAME=ladill_give
 DB_PASSWORD=
 
+REDIS_CLIENT=phpredis
+REDIS_HOST=127.0.0.1
+REDIS_PASSWORD=null
+REDIS_PORT=6379
+
 # Read platform admin settings (Paystack keys live in ladilldb.platform_settings).
 PLATFORM_DB_HOST=127.0.0.1
 PLATFORM_DB_PORT=3306
@@ -24,7 +29,7 @@ PLATFORM_DB_DATABASE=ladilldb
 PLATFORM_DB_USERNAME=ladill_give
 PLATFORM_DB_PASSWORD=
 
-SESSION_DRIVER=database
+SESSION_DRIVER=redis
 # Idle web session length in minutes (1440 = 24 hours of inactivity).
 SESSION_LIFETIME=1440
 SESSION_DOMAIN=.ladill.com