Fix QlPort and QlGrpcPort environment variables ignored in host network mode and pm2 reload (#2825)

* Initial plan

* Fix host mode port configuration by using QlPort environment variable

Co-authored-by: whyour <22700758+whyour@users.noreply.github.com>

* Fix GRPC_PORT conflict in host network mode

Co-authored-by: whyour <22700758+whyour@users.noreply.github.com>

* Ensure BACK_PORT and GRPC_PORT survive pm2 reload with --update-env

Co-authored-by: whyour <22700758+whyour@users.noreply.github.com>

* Move env.sh sourcing after fix_config to preserve more environment variables

Co-authored-by: whyour <22700758+whyour@users.noreply.github.com>

* Refactor: Extract export_ql_envs function and move env.sh sourcing earlier

Co-authored-by: whyour <22700758+whyour@users.noreply.github.com>

* Extract load_ql_envs function and reorder initialization in docker-entrypoint.sh and update.sh

Co-authored-by: whyour <22700758+whyour@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: whyour <22700758+whyour@users.noreply.github.com>

shell/update.sh

@@ -3,6 +3,7 @@
 dir_shell=$QL_DIR/shell
 . $dir_shell/share.sh
 . $dir_shell/api.sh
+load_ql_envs
 . $dir_shell/env.sh
 
 send_mark=$dir_shell/send_mark