fix: handle large terminated sessions caching with pagination to prevent RAM overflow;

feat: add paginated query for terminated sessions GUIDs with limit and offset;
refactor: batch processing terminated sessions in Redis with pipeline;
chore: log batch caching progress for terminated sessions;
fix: set TTL for session termination cache keys (8 hours);
refactor: update SQL query for terminated sessions to use pagination;
fix: correct loop structure in auth service initialization

sqlc/query.sql

@@ -253,11 +253,13 @@ WHERE
   user_id = $1 AND terminated IS FALSE AND
   last_refresh_exp_time > CURRENT_TIMESTAMP;
 
-;-- name: GetUnexpiredTerminatedSessionsGuids :many
+-- name: GetUnexpiredTerminatedSessionsGuidsPaginated :many
 SELECT guid FROM sessions
 WHERE 
   terminated IS TRUE AND
-  last_refresh_exp_time > CURRENT_TIMESTAMP;
+  last_refresh_exp_time > CURRENT_TIMESTAMP
+LIMIT @batch_size::integer
+OFFSET $2;
 
 ;-- name: TerminateAllSessionsForUserByUsername :many
 UPDATE sessions