Add zstd support on legacy record and ensure no variable is referred before definition #165

Job	Run time
📦 Build the source distribution	16s
Tests on 3.8	5m 32s
📦 Publish to PyPI	0s
Tests on 3.9	5m 33s
Tests for Kafka 0.9.0.1 (Python 3.12)	2m 41s
Tests on 3.10	6m 7s
Tests for Kafka 0.10.2.2 (Python 3.12)	4m 7s
Tests on 3.11	6m 25s
Tests for Kafka 0.11.0.2 (Python 3.12)	5m 2s
Tests on 3.12	6m 15s
Tests for Kafka 0.11.0.3 (Python 3.12)	4m 53s
Tests on pypy3.9	7m 25s
Tests for Kafka 1.1.1 (Python 3.12)	5m 48s
Tests for Kafka 2.4.0 (Python 3.12)	6m 20s
Tests for Kafka 2.5.0 (Python 3.12)	6m 23s
Tests for Kafka 2.6.0 (Python 3.12)	5m 57s
Tests for Kafka 0.8.2.2 (Python 3.12)	15m 14s
Tests for Kafka 0.8.2.2 (Python 3.10)	2m 24s
✅ Ensure the required checks passing	4s
	1h 36m 26s

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