Document context lifecycle & logging semantics for the TestContext framework
Document context lifecycle & logging semantics for the TestContext framework

This commit documents ApplicationContext initialization and shutdown
logging semantics for console output triggered in conjunction with the
Spring TestContext Framework.

Closes gh-25385

spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework