When to support interceptor ??

Description

How to reproduce

Checklist

Please provide the following information:

• A complete (i.e. we can run it), minimal program demonstrating the problem. No need to supply a project file.
• Confluent.Kafka nuget version.
• Apache Kafka version.
• Client configuration.
• Operating system.
• Provide logs (with "debug" : "..." as necessary in configuration).
• Provide broker log excerpts.
• Critical issue.

[mhowlett]

we have no near term plans to add support for interceptors at the C# level.

librdkafka has an interceptor API, but you'll need to write them in C, and you won't be able to share state from C# code easily.

[careless6666]

Interceptors were useful both for metrics, logs and traces