Feature: Add support for async deserializer

[akolenko-tcs]

Hello again! I've decided to reopen the issue #1820. I didn't ask for adding avro code to your library, I just wanted to suggest adding support for async deserializers.

In the example of faststream deserialization (https://faststream.airt.ai/latest/getting-started/serialization/examples/#avro) you have msg_dict = fastavro.schemaless_reader(bytes_reader, schema). However, in the example I've provided in that issue was writer_schema = await self._schema_registry.get_by_id(schema_id). So async deserialization would be really useful for using your library.

Hope that you understood what I've meant. If you have any questions, feel free to ask them.

[Lancetnik]

"Reopen Issue" is not the same with "create a new one"

Also, I still can't get your idea. You refer to not-FastStream code (avro serialization), so I don't think, that we can/should improve it

Can you suggest any API to explain me how it should works?

[Lancetnik]

Probably, your Issue related to #1774 and #1297

[Lancetnik]

@kumaranvpl can you help me here, please?

[kumaranvpl]

@kumaranvpl can you help me here, please?

I have no idea what he is talking about. Avro serialization is just an example and @akolenko-tcs is free to use whatever serialization he wants.

It could be better if he just provides a faststream code example rather than providing a vague AsyncDeserializer class which adds to more confusion