Ruby has been left on the ice for now because we're blocked on #421

This checklist intends to facilitate resuming work on Ruby whenever we get unblocked by listing changes we've made in other languages which should be reflected in Ruby:

• observability of kiota clients #618
• application/x-www-form-urlencoded request content type is not handled properly #219

Already splat and added to the backlog

• Add support for discriminator and type downcast during deserialization #648
• Url parameter names with characters that cannot be used in language identifiers do not work. #1445
• GitHub OpenAPI file fails to generate due to the use of two different parameters as collection indexes. #1535 (multiple indexers, scalar content type for request information)
• TypeScript - Reconsider RequestInfo class name as the name is built-in in the language  #551
• Parsable interface should be splat #737
• Optimization - get field deserializers doesn't need to be passed the current object in most languages #1490
• Handling 204 response codes #1410
• Add support for requests that allow passing a model or a stream. #134
• baseUrl set on request adapter is overwritten by generated client constructor #1443
• Add support for global error handling #411
• Support for raw content in text/plain responses #878
• Rename IMiddlewareOption to IRequestOption #635
• add support for middleware pipeline for request execution #120
• authentication providers should check for valid hostnames before adding anything #1009
• Serialization support for Duration, Date and TimeOfDay types #1004
• Handle text based media type responses. #302
• refactor the authentication provider interface #497
• Authentication infrastructure updates for CAE support #1179
• URL templating support #628
• Base Url should be a path parameter #785
• accept header should be defined based on the description information #1607
• Builder should support application-specific JSON MIME specifiers #1197

new issues for the backlog

• define the access token provider interface for ruby #1638
• CAE infrastructure work for ruby #1643
• Support for Duration, Date only, and Time only in Ruby #1644
• serialization library for text in Ruby kiota-abstractions-ruby#52
• backing store support kiota-abstractions-ruby#53
• api client constructor should check whether the base URL is set before trying to set it in ruby #1647
• setup middleware pipeline for Ruby request adapter #1650
• ruby support for discriminator downcast during deserialization #1652
• add support for error handling for ruby #1653
• parsable interface needs to be splat in ruby #1654
• support for binary request body and binary response in ruby kiota-abstractions-ruby#54
• 204 responses handling in ruby #1656
• add the accept header to the request generator method in Ruby #1660
• add support for vendor specific mime types in serialization/deserialization in ruby #1661
• fields deserializers don't need to be passed the current instance in ruby #1663
• support for escaped query parameter names in ruby #1664
• validate non of the names used in abstractions conflict with Ruby SDL #1665
• validate ruby handles multiple indexers endpoints at the same level #1666