[August 2026] Python stack update

[Shi1810]

=== Python ===
Python 3.13: 3.13.14 -> 3.13.15
Python 3.14: 3.14.6 -> 3.14.7

[github-actions]

SHA Validation Summary

Stack	Status
PHP	✅ success
.NET	✅ success

PHP Validation Output

Validating PHP SHA256 hashes from: images/constants.yml
==================================================
PHP 8.1.34: OK
PHP 8.2.31: OK
PHP 8.3.31: OK
PHP 8.4.21: OK
PHP 8.5.6: OK
==================================================
Validated: 5 PHP version(s)
SHA VALIDATION PASSED

.NET Validation Output

Validating .NET SHA512 hashes...
  .NET Runtime 8.0.29: OK
  .NET Runtime 9.0.18: OK
  NET_CORE_APP_100: SKIP (no SHA defined)
  NET_CORE_APP_110: SKIP (no SHA defined)
  ASP.NET Core 8.0.29: OK
  ASP.NET Core 9.0.18: OK
  ASPNET_CORE_APP_100: SKIP (no SHA defined)
  ASPNET_CORE_APP_110: SKIP (no SHA defined)
SHA VALIDATION PASSED