Add getCodec method to StatefulRedisClusterConnectionImpl

[jruaux]

Add a RedisCodec<K,V> getCodec() method like StatefulRedisConnectionImpl does

[Copilot]

Pull Request Overview

Adds a getCodec() method to StatefulRedisClusterConnectionImpl to provide access to the underlying Redis codec, bringing consistency with StatefulRedisConnectionImpl which already has this method.

• Add public getCodec() method that returns the RedisCodec<K,V> instance

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[Copilot]

The new public method getCodec() lacks documentation. Add a Javadoc comment explaining what the method returns and its purpose, similar to the documentation pattern used in the rest of the codebase.

Suggested change

	/**
	* Returns the {@link RedisCodec} used to encode and decode keys and values for this connection.
	*
	* @return the codec used by this connection.
	*/

[tishun]

Hey @jruaux ,

can you give me some context to why we need this?

Overall I am not opposed, but I'd rather expose it as part of the contract, as right now it requires casting which is not a very good pattern to follow.