Add SQL Server dialect support with new SqlServerChatMemoryDialect class
Create schema-sqlserver.sql script for SQL Server table creation
Refactor database schema initialization with new JdbcChatMemorySchemaInitializer
Standardize table names across databases to SPRING_AI_CHAT_MEMORY
Implement ChatMemoryDialect abstraction for database-specific operations
Add dialect implementations for PostgreSQL, MySQL/MariaDB, HSQLDB
Update configuration properties with more flexible schema initialization options
Enhance documentation with detailed information about dialect support and configuration
Add integration tests for HSQLDB and SQL Server
Signed-off-by: Mark Pollack <247466+markpollack@users.noreply.github.com>
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