refactor(jedis): migrate to Jedis 7.2 API with RedisClient

[bsbodden]

Replace all deprecated Jedis classes with the new unified Jedis 7.2 API:

• Upgrade Jedis dependency from 7.0.0 to 7.2.0
• Replace JedisPool/JedisPooled with RedisClient.create()
• Replace JedisSentinelPool with RedisSentinelClient.builder()
• Remove JedisPoolConfig dependency from RedisConnectionConfig
• Update SearchIndex to use unified getUnifiedJedis() method
• Update VCR infrastructure (VCRContext, VCRRegistry, VCRCassetteStore)
• Update all test base classes to use RedisClient
• Update LangChain4J stores and documentation examples
• Update demo applications (rag-multimodal, standalone)

The new Jedis 7.2 API provides:

• RedisClient for standalone connections
• RedisSentinelClient for HA deployments
• RedisClusterClient for cluster mode
• All extend UnifiedJedis for backwards compatibility

This removes deprecation warnings and modernizes the codebase to use the recommended Jedis connection patterns.

[Copilot]

Pull request overview

This PR refactors the codebase to use the modern Jedis 7.2 API, replacing deprecated classes with the new unified connection pattern. The migration upgrades Jedis from 7.0.0 to 7.2.0 and eliminates deprecation warnings throughout the codebase.

Key changes include:

• Replacing JedisPool/JedisPooled with RedisClient.create() for standalone connections
• Replacing JedisSentinelPool with RedisSentinelClient.builder() for HA deployments
• Updating all test infrastructure, stores, and demo applications to use the new API

Reviewed changes

Copilot reviewed 27 out of 27 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
core/build.gradle.kts	Upgrades Jedis dependency from 7.0.0 to 7.2.0
core/src/main/java/com/redis/vl/redis/RedisConnectionManager.java	Refactored to use RedisClient and RedisSentinelClient instead of JedisPool/JedisSentinelPool
core/src/main/java/com/redis/vl/redis/RedisConnectionConfig.java	Removed deprecated toJedisPoolConfig() method
core/src/main/java/com/redis/vl/index/SearchIndex.java	Removed deprecated Jedis constructor, updated to use UnifiedJedis exclusively via getUnifiedJedis()
core/src/main/java/com/redis/vl/test/vcr/VCRContext.java	Updated to use UnifiedJedis and raw commands via sendCommand for BGSAVE/LASTSAVE
core/src/main/java/com/redis/vl/test/vcr/VCRRegistry.java	Updated field type from JedisPooled to UnifiedJedis
core/src/main/java/com/redis/vl/test/vcr/VCRCassetteStore.java	Updated field type from JedisPooled to UnifiedJedis
core/src/main/java/com/redis/vl/langchain4j/RedisVLDocumentStore.java	Updated javadoc example to use RedisClient.create()
core/src/main/java/com/redis/vl/langchain4j/RedisVLChatMemoryStore.java	Updated javadoc example to use RedisClient.create()
core/src/test/java/com/redis/vl/test/BaseIntegrationTest.java	Migrated from JedisPool to RedisClient, simplified cleanup
core/src/test/java/com/redis/vl/BaseIntegrationTest.java	Migrated from JedisPool to RedisClient for test infrastructure
core/src/test/java/com/redis/vl/BaseSVSIntegrationTest.java	Migrated from JedisPool to RedisClient
core/src/test/java/com/redis/vl/redis/RedisConnectionManagerTest.java	Updated tests to use getClient() instead of getJedis(), removed connection pooling test
core/src/test/java/com/redis/vl/index/SearchIndexTest.java	Updated to create RedisClient directly, removed separate Jedis client usage
core/src/test/java/com/redis/vl/index/SearchIndexIntegrationTest.java	Updated to use unifiedJedis for hash operations instead of deprecated jedis field
core/src/test/java/com/redis/vl/schema/JsonFieldAliasIntegrationTest.java	Updated to use RedisClient.create() instead of JedisPooled
core/src/test/java/com/redis/vl/langchain4j/RedisVLEmbeddingStoreTest.java	Updated to use RedisClient.create() instead of JedisPooled
core/src/test/java/com/redis/vl/langchain4j/RedisVLEmbeddingStoreFilterTest.java	Updated to use RedisClient.create() instead of JedisPooled
core/src/test/java/com/redis/vl/langchain4j/RedisVLDocumentStoreTest.java	Updated to use RedisClient.create() instead of JedisPooled
core/src/test/java/com/redis/vl/langchain4j/RedisVLChatMemoryStoreTest.java	Updated to use RedisClient.create() instead of JedisPooled
demos/rag-multimodal/src/main/java/com/redis/vl/demo/rag/service/ServiceFactory.java	Updated to use RedisClient.create() for connection initialization
demos/rag-multimodal/src/main/java/com/redis/vl/demo/rag/MultimodalRAGStandalone.java	Updated to use RedisClient.create(), removed HostAndPort import
demos/rag-multimodal/src/test/java/com/redis/vl/BaseIntegrationTest.java	Migrated from JedisPool to RedisClient
demos/rag-multimodal/src/test/java/com/redis/vl/demo/rag/service/MultimodalRAGIntegrationTest.java	Updated to use jedis reference consistently from base class
docs/design/VCR_TEST_SYSTEM.md	Updated documentation examples to show RedisClient usage
docs/design/EMBEDDINGS_CACHE_ENHANCEMENT.md	Updated constructor signature to use RedisClient
docs/content/modules/ROOT/pages/langchain4j.adoc	Updated code examples to use RedisClient.create() instead of JedisPooled

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