Добавлен индекс в _pico_instance

Picodata follow-up

• Follow-up for picodata!1441 (merged)
• See also picodata#1087 (closed)

В _pico_instance добавлен индекс по колонке uuid

picodata!1441 (diffs)

added p/high label

changed the description

mentioned in merge request picodata!1441 (merged)

changed milestone to %25.1 - Datamart

assigned to @a.tolstoy

added person/AlexanderTolstoy label

added triaged label

mentioned in merge request !614 (merged)

closed with merge request !614 (merged)