Function update_modified_phase 

pub async fn update_modified_phase<E>(
    conn: &mut dyn IAsyncConnection,
    provider: &dyn IDatabaseProvider,
    db_set: &mut DbSet<E>,
    meta: &EntityTypeMeta,
    query_filter: Option<&BoolExpr>,
) -> EFResult<usize>
where
    E: IEntityType + IEntitySnapshot + IGetKeyValues,

Phase 2: UPDATE Modified entities (partial update via modified_properties).