Bump Gradle wrapper to 9.7.0 and pin its checksum

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: IRus

gradle/wrapper/gradle-wrapper.jar

@@ -1,6 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-9.6.1-bin.zip
+distributionSha256Sum=84fbba45c7f4c64abc77460e1c00f541e9f960e3c7ed2538f1ede19eacd873ae
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.7.0-bin.zip
 networkTimeout=10000
 retries=0
 retryBackOffMs=500