Polish dependencies (#3198)

Signed-off-by: Yanming Zhou <zhouyanming@gmail.com>

memory/repository/spring-ai-model-chat-memory-repository-jdbc/pom.xml

@@ -55,10 +55,13 @@
 			<artifactId>HikariCP</artifactId>
 		</dependency>
 
+		<!-- TESTING -->
+
 		<dependency>
 			<groupId>org.postgresql</groupId>
 			<artifactId>postgresql</artifactId>
 			<version>${postgresql.version}</version>
+			<scope>test</scope>
 			<optional>true</optional>
 		</dependency>
 
@@ -66,6 +69,7 @@
 			<groupId>org.mariadb.jdbc</groupId>
 			<artifactId>mariadb-java-client</artifactId>
 			<version>${mariadb.version}</version>
+			<scope>test</scope>
 			<optional>true</optional>
 		</dependency>
 
@@ -76,7 +80,6 @@
 			<optional>true</optional>
 		</dependency>
 
-		<!-- TESTING -->
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>