Refactor chat memory repository autoconfigurations and Spring Boot starters for clarity

- Rename chat memory repository autoconfiguration modules to include the "repository" suffix:
    - spring-ai-autoconfigure-model-chat-memory-cassandra -> spring-ai-autoconfigure-model-chat-memory-repository-cassandra
    - spring-ai-autoconfigure-model-chat-memory-jdbc -> spring-ai-autoconfigure-model-chat-memory-repository-jdbc
    - spring-ai-autoconfigure-model-chat-memory-neo4j -> spring-ai-autoconfigure-model-chat-memory-repository-neo4j
- Update Spring Boot starter modules to match the new naming convention.
- Rename packages to include `.repository.` for improved clarity and consistency.
- Rename configuration and related classes to use the `ChatMemoryRepository` suffix.
- Update Spring AI BOM and parent POM files to reference the new artifact names.
- Update all imports, references, and configuration to use the new package and class names.

BREAKING CHANGE:
These changes require users to update their dependencies, imports, and configuration to use the new artifact, package, and class names. See the upgrade notes for migration instructions.

Signed-off-by: Ilayaperumal Gopinathan <ilayaperumal.gopinathan@broadcom.com>

spring-ai-docs/src/main/antora/modules/ROOT/pages/api/chatclient.adoc

@@ -528,43 +528,15 @@ This allows you to tailor the logged information to your specific needs.
 
 TIP: Be cautious about logging sensitive information in production environments.
 
-== Chat Memory (Deprecated)
-
-IMPORTANT: Refer to the new xref:api/chat-memory.adoc[Chat Memory] documentation for the current features and capabilities.
+== Chat Memory
 
 The interface `ChatMemory` represents a storage for chat conversation history. It provides methods to add messages to a conversation, retrieve messages from a conversation, and clear the conversation history.
 
-There are currently four implementations: `CassandraChatMemory`, `Neo4jChatMemory`, and `JdbcChatMemory`, which provide storage for chat conversation history in-memory, persisted with `time-to-live` in Cassandra, and persisted without `time-to-live` in Neo4j and Jdbc, respectively.
+There is currently one implementation: `MessageWindowChatMemory`.
 
-=== CassandraChatMemory
+`MessageWindowChatMemory` is a chat memory implementation that maintains a window of messages up to a specified maximum size (default: 20 messages). When the number of messages exceeds this limit, older messages are evicted, but system messages are preserved. If a new system message is added, all previous system messages are removed from memory. This ensures that the most recent context is always available for the conversation while keeping memory usage bounded.
 
-To create a `CassandraChatMemory` with `time-to-live`:
 
-[source,java]
-----
-CassandraChatMemory.create(CassandraChatMemoryConfig.builder().withTimeToLive(Duration.ofDays(1)).build());
-----
+The `MessageWindowChatMemory` is backed by the `ChatMemoryRepository` abstraction which provides storage implementations for the chat conversation history. There are several implementations available, including the `InMemoryChatMemoryRepository`, `JdbcChatMemoryRepository`, `CassandraChatMemoryRepository` and `Neo4jChatMemoryRepository`.
 
-IMPORTANT: Refer to the new xref:api/chat-memory.adoc#_cassandra_repository[Cassandra Chat Memory Repository] documentation for the current features and capabilities.
-
-=== Neo4jChatMemory
-
-The Neo4j chat memory supports the following configuration parameters:
-
-[cols="2,5,1",stripes=even]
-|===
-|Property | Description | Default Value
-
-| `spring.ai.chat.memory.neo4j.messageLabel` | The label for the nodes that store messages | `Message`
-| `spring.ai.chat.memory.neo4j.sessionLabel` | The label for the nodes that store conversation sessions | `Session`
-| `spring.ai.chat.memory.neo4j.toolCallLabel` | The label for nodes that store tool calls, for example
-in Assistant Messages | `ToolCall`
-| `spring.ai.chat.memory.neo4j.metadataLabel` | The label for the node that store a message metadata | `Metadata`
-| `spring.ai.chat.memory.neo4j.toolResponseLabel` | The label for the nodes that store tool responses | `ToolResponse`
-| `spring.ai.chat.memory.neo4j.mediaLabel` | The label for the nodes that store the media associated to a message | `ToolResponse`
-
-|===
-
-=== JdbcChatMemory
-
-IMPORTANT: Refer to the new xref:api/chat-memory.adoc#_jdbc_repository[JDBC Chat Memory Repository] documentation for the current features and capabilities.
+This implementation is the default for conversation history management in Spring AI. For more details and usage examples, see the xref:api/chat-memory.adoc[Chat Memory] section.

spring-ai-docs/src/main/antora/modules/ROOT/pages/upgrade-notes.adoc

@@ -55,6 +55,19 @@ If you were providing custom templates for the following advisors, you'll need t
 The Watson AI model was removed as it was based on the older text generation that is considered outdated as there is a new chat generation model available.
 Hopefully Watson will reappear in a future version of Spring AI
 
+==== Chat Memory Repository Module and Autoconfiguration Renaming
+
+In 1.0.0-RC1, the chat memory modules, starters, and autoconfiguration classes for Cassandra, JDBC, and Neo4j have been renamed to include the `repository` suffix for clarity. This impacts artifact IDs, Java package names, and class names. For example:
+
+- Artifact IDs:
+- `spring-ai-autoconfigure-model-chat-memory-jdbc` → `spring-ai-autoconfigure-model-chat-memory-repository-jdbc`
+- `spring-ai-starter-model-chat-memory-jdbc` → `spring-ai-starter-model-chat-memory-repository-jdbc`
+- Java packages now use `.repository.` (e.g., `org.springframework.ai.model.chat.memory.repository.jdbc.autoconfigure`).
+- Main autoconfiguration classes are now named `JdbcChatMemoryRepositoryAutoConfiguration`, `CassandraChatMemoryRepositoryAutoConfiguration`, etc.
+
+**Migration Required:**
+- Update your Maven/Gradle dependencies to use the new artifact IDs.
+- Update any imports, class references, or configuration that used the old package or class names.
 
 
 [[upgrading-to-1-0-0-m8]]