fix(store): improve loose mode invalidation for listing models

[smalluban]

• Fixed listing model invalidation bug: Listing models with loose: true storage now properly invalidate when items are changed or added

• Renamed cache API: Changed cache.set() to cache.sync() for clearer semantics and added entry.resolved = true to prevent duplicate getter calls

• Simplified validation logic: Store now uses entry.resolved and validate() checks instead of complex model state comparisons for cache invalidation

• Updated tests: All cache tests now use sync() instead of set(), plus added new test to verify listing invalidation works correctly in loose mode

[coveralls]

coverage: 99.914%. remained the same
when pulling 39eccbf on fix-store
into 1307ad8 on main.