fix: corrected the session duration to default to 3600 seconds i.e. 1 hour

Author: mridang

.env.example

@@ -22,7 +22,7 @@ SESSION_SECRET="your-very-secret-and-strong-session-key"
 # The total duration of the session in seconds. After this period of
 # inactivity, the user will be effectively logged out.
 # Default is 3600, which is 1 hour (60 * 60).
-SESSION_DURATION=3600000
+SESSION_DURATION=3600
 
 # -----------------------------------------------------------------------------
 # ZITADEL OpenID Connect (OIDC) Configuration