* fix(t2i): sync active template across all configs
apply template activation and reset to every config profile instead of only
the default one, and reload each pipeline scheduler so changes take effect
consistently in multi-config setups
add a dashboard test that creates extra configs and verifies active template
updates and scheduler reload coverage across all config ids
* fix(t2i): reload all schedulers on template changes
extract a shared helper to reload pipeline schedulers for every config.
when syncing or resetting the active template, persist each config and
then reload all schedulers to keep mappings consistent.
also reload all schedulers when updating the currently active template,
and add dashboard tests to verify cross-config sync and scheduler
replacement behavior.