v0.19.0-beta1

Changelog

• f19e8aa Fix failing tests
• da5c051 Lint fix
• 5da0963 Migrate DB: rename namespace, automigrate user
• 9eaa8dd Migrate DB: rename table is plural, order matters
• b98bf19 Regenerate go from proto
• af1ec5a Rename .go namespace files
• e3a2593 Rename [Nn]amespace -> [Uu]ser in go code
• bf0b85f Rename acl test file
• 428d7c8 Rename namespace in protobuf files
• fb3e2dc Rename namespace to user in docs
• 86a7129 Update changelog, more explicit backup note
• 90287a6 gofumpt
• 81441af update changelog