Log4j2EventListener's @ConditionalOnProperty has no effect - the listener always runs

## Description

`Log4j2EventListener` carries `@ConditionalOnProperty("spring.cloud.config.watch.enabled")` but always runs.

It is registered twice:

- as `@Component` — the condition applies
- in `META-INF/spring.factories` (line 17) as an `ApplicationListener` — the condition **cannot** apply, because `SpringApplication` instantiates these directly, with no bean definition to suppress

So `spring.cloud.config.watch.enabled=false` disables nothing.

**Version:** 2.x `04c93c1d33` · JDK 21 · Spring Boot 3.4.3

## Logs

Property set to `false`, `monitorInterval` 300s:

```
RELOADED - the refresh event drove the reload, 298 seconds before
the monitorInterval would have
```

298s ahead of the interval, so the event drove it, not the timer.

## Reproduction

Run with `-Dspring.cloud.config.watch.enabled=false` and publish an `EnvironmentChangeEvent` (POST `/actuator/refresh`). Log4j reconfigures anyway.

## Suggested fix

Check the property inside `onApplicationEvent` against the `Environment` — smallest change, keeps the documented switch meaningful. Or drop `@ConditionalOnProperty` so the source stops promising a switch that does not exist.

Start by locating Log4j2EventListener and its registration in META-INF/spring.factories at line 17, then inspect onApplicationEvent. Reproduce with spring.cloud.config.watch.enabled=false and an EnvironmentChangeEvent from POST /actuator/refresh. Done means the listener does not reconfigure Log4j when the property is false.

Written by the indexing model from the issue text.