mailer provider: grab mailer provider status

[syndr0m]

we want to grab mailblast last email info (ACTIVE/UNSUBSCRIBED/HARD_BOUNCE/...)

we should save in an association : userId, providerId, state maybe in MailerAssoListsSubscribersProviders, but it requires :

• to create a subscriber in mailer table
• to fetch / create lists on crawl, to mirror the lists (listId)
• (...)

first simple implementation is to merge all providers info into a single field, adding "Last" state keyword

ALTER TABLE "Users" ADD COLUMN "mailerProviderLastState" character varying(32);