fix: add @DisableCachingByDefault for Gradle 9 plugin validation

Add @DisableCachingByDefault to ApplicationContextCommandTask,
ApplicationContextScriptTask, and GrailsRunTask to satisfy Gradle 9's
requirement that all task types declare their caching intent.

Assisted-by: Claude Code <Claude@Claude.ai>

Author: jamesfredley

grails-gradle/plugins/src/main/groovy/org/grails/gradle/plugin/commands/ApplicationContextCommandTask.groovy

@@ -21,6 +21,7 @@ package org.grails.gradle.plugin.commands
 import groovy.transform.CompileStatic
 
 import org.gradle.api.tasks.JavaExec
+import org.gradle.work.DisableCachingByDefault
 
 import javax.inject.Inject
 
@@ -31,6 +32,7 @@ import javax.inject.Inject
  * @since 3.0
  */
 @CompileStatic
+@DisableCachingByDefault(because = 'Application command tasks produce no cacheable output')
 abstract class ApplicationContextCommandTask extends JavaExec {
 
     @Inject

grails-gradle/plugins/src/main/groovy/org/grails/gradle/plugin/commands/ApplicationContextScriptTask.groovy

@@ -21,10 +21,12 @@ package org.grails.gradle.plugin.commands
 import groovy.transform.CompileStatic
 
 import org.gradle.api.tasks.JavaExec
+import org.gradle.work.DisableCachingByDefault
 
 import javax.inject.Inject
 
 @CompileStatic
+@DisableCachingByDefault(because = 'Application script tasks produce no cacheable output')
 abstract class ApplicationContextScriptTask extends JavaExec {
 
     @Inject

grails-gradle/plugins/src/main/groovy/org/grails/gradle/plugin/run/GrailsRunTask.groovy

@@ -21,6 +21,7 @@ package org.grails.gradle.plugin.run
 import groovy.transform.CompileStatic
 
 import org.gradle.api.tasks.JavaExec
+import org.gradle.work.DisableCachingByDefault
 
 /**
  * Extension to the standard JavaExec task to run Grails applications
@@ -29,4 +30,5 @@ import org.gradle.api.tasks.JavaExec
  * @since 3.2
  */
 @CompileStatic
+@DisableCachingByDefault(because = 'Application run tasks produce no cacheable output')
 abstract class GrailsRunTask extends JavaExec {}