Multiple improvements across various features

platformOS cookie is marked as secure
preview of a public interface for checking data modifications (User, Record) with admin_versions — currently it displays changes during the last 7 days.
added new is_json_valid filter
added support for Sendgrid unique arguments to EmailNotification
added admin_pages_delete_all mutation

possibility to put Table definitions (old ModelSchema) in the app/schema directory
performance of querying for total number of records, without returning actual records
function tag now has access to the context variable by default
pos-cli sync by default now uploads assets directly to S3
YAML parser now allows three dashes as a value of a field
removed ambiguity when selecting Instances to copy in the Partner Portal
error message when providing invalid credentials to pos-cli now clearly states the login or password is invalid
renaming Model to Record and ModelSchema to Table, along with adding corresponding GraphQL queries and mutations
allow to filter pages by deleted_at in admin_pages mutation

Questions?