Add SSL/TLS support to RedisHandler

[BenCodez]

Summary

• add an SSL/TLS-aware RedisHandler constructor while preserving the existing plaintext constructor
• configure Jedis TLS through DefaultJedisClientConfig
• enable certificate hostname verification with the HTTPS endpoint-identification algorithm
• rely on the JVM truststore for Redis certificate validation
• add tests for both TLS-enabled and default plaintext client configurations

Verification

• mvn test on Java 21: 168 tests passed, 0 failures, 0 errors

Follow-up

VotingPlugin integration is in BenCodez/VotingPlugin#1580. Merge and publish this SimpleAPI snapshot before building that PR.

[chatgpt-codex-connector]

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