updates on the env and pagination

.env.example

@@ -24,6 +24,15 @@ REDIS_PORT=6379
 REDIS_USER=admin
 REDIS_PASSWORD=Package@321#
 
+# Customer-app sign-in (QA only).
+#
+# A fixed verification code accepted for every identifier, standing in for a
+# real SMS gateway. Commented out by default: leaving it set is a skeleton key.
+#
+# StagingCode() refuses it when ENV=production and logs an error -- so on a
+# production deployment setting this does nothing and only says so in the log.
+# CX_STAGING_OTP=1234
+
 # SMTP Configuration (email OTP verification)
 SMTP_HOST=smtp.gmail.com
 SMTP_PORT=465