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Add chat-memory module: MessageWindowChatMemory, JDBC and Redis repositories, per-user conversation IDs

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Real PostgreSQL 16 and Redis Stack 7.4; 24 tests write output/01-24. Covers the 20-message
default window with no property, the 36-character conversation_id, tool messages dropped by
JdbcChatMemoryRepository, concurrent add() on one conversation, a 1.x table under the 2.0
repository, the Redis repository silently backing off for a custom ChatMemory, and the
removal of PromptChatMemoryAdvisor.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Ja4jkzrbQ4LQZBNrb5mkZE
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Claude
2026-09-24 15:56:47 +00:00
parent c1e36c6c09
commit 823f6fac5b
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chat-memory/output/15-redis-round-trip.txt
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# RedisChatMemoryRepository on Redis Stack
ChatMemoryRepository bean: RedisChatMemoryRepository
call 1 reply: Nice to meet you, Priya.
Keys under the default prefix "chat-memory:" (3: one JSON document per message, plus a counter):
chat-memory:6f0a1c9e-2b7d-4c55-9a53-0d1f3e7a2b10:<n>
chat-memory:6f0a1c9e-2b7d-4c55-9a53-0d1f3e7a2b10:<n>
chat-memory:counter:6f0a1c9e-2b7d-4c55-9a53-0d1f3e7a2b10
Fields of one document: [content, conversation_id, metadata, timestamp, type]
TTL on each key (spring.ai.chat.memory.repository.redis.time-to-live=24h): between 86390 and 86400 s -> true
Same conversation, second call "What is my name?":
reply: Your name is Priya.
stored: U:My name is Priya | A:Nice to meet you, Priya. | U:What is my name? | A:Your name is Priya.