As a user I would like to be able to still continue using v1 API(s) when v2 is released, so that I don't have to change my codebase right away.

Acceptance criteria
As a v2 user I can still use v1 endpoint for my ingestion pipeline before I transition.

ToDo

• add pages endpoint to the API(s): GET ​/v1​/pages​/meta​/{project}​/{name}
• add diffs endpoints to the API(s):
  • ​GET /v1​/diffs​/download​/{date}​/{namespace}​/{project}
  • ​GET /v1​/diffs​/meta​/{date}​/{namespace}
  • ​GET /v1​/diffs​/meta​/{date}​/{namespace}​/{project}
• add exports endpoint to the API(s):
  • ​GET /v1​/exports​/download​/{namespace}​/{project}
  • ​HEAD /v1​/exports​/download​/{namespace}​/{project}
  • GET ​/v1​/exports​/meta​/{namespace}
  • ​GET /v1​/exports​/meta​/{namespace}​/{project}
• make sure the schema is identical, meaning no new fields
• add /v1/page-update to realtime API
• add /v1/page-delete to realtime API
• add /v1/page-visibility to realtime API
• update the ACL(s)
• update the WAF configuration