9 files declare their use of UuidInterface in Zircon Profile 8

BaseFieldOverrideStorage.php in core/lib/Drupal/Core/Field/BaseFieldOverrideStorage.php

Contains \Drupal\Core\Field\BaseFieldOverrideStorage.

ConfigEntityStorage.php in core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php

Contains \Drupal\Core\Config\Entity\ConfigEntityStorage.

FieldConfigStorage.php in core/modules/field/src/FieldConfigStorage.php

Contains \Drupal\field\FieldConfigStorage.

FieldStorageConfigStorage.php in core/modules/field/src/FieldStorageConfigStorage.php

Contains \Drupal\field\FieldStorageConfigStorage.

KeyValueEntityStorage.php in core/lib/Drupal/Core/Entity/KeyValueStore/KeyValueEntityStorage.php

Contains \Drupal\Core\Entity\KeyValueStore\KeyValueEntityStorage.

MigrationStorage.php in core/modules/migrate/src/MigrationStorage.php

Contains \Drupal\migrate\MigrationStorage.

MigrationStorageTest.php in core/modules/migrate/tests/src/Unit/MigrationStorageTest.php

Contains \Drupal\Tests\migrate\Unit\MigrationStorageTest.

ShortcutSetStorage.php in core/modules/shortcut/src/ShortcutSetStorage.php

Contains \Drupal\shortcut\ShortcutSetStorage.

UuidTest.php in core/tests/Drupal/Tests/Component/Uuid/UuidTest.php

Contains \Drupal\Tests\Component\Uuid\UuidTest.