Phase 3: Implement Avro decoder and SMQ RecordValue mapper

- Add goavro dependency for Avro schema parsing and decoding
- Implement AvroDecoder with binary data decoding to Go maps
- Add MapToRecordValue() to convert Go values to schema_pb.RecordValue
- Support complex types: records, arrays, unions, primitives
- Add type inference from decoded maps to generate RecordType schemas
- Handle Avro union types and null values correctly
- Comprehensive test coverage including integration tests

This enables conversion of Avro messages to SeaweedMQ format.
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chrislu committed 2025-09-11 11:29:16 -07:00
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