Issue #513: Use IOException for invalid ZIP entries

[jayalakshmi-sasidharan]

Fixes #513.

CacheUtils.unzip() already declares IOException, but an invalid ZIP entry resolving outside the extraction directory was reported using an unchecked RuntimeException.

This change replaces that exception with IOException, keeping the failure consistent with the existing unzip() API contract.

A regression test was added using a ../outside.txt ZIP entry. The test verifies that:

• IOException is thrown for the invalid entry
• no file is written outside the extraction directory

The regression test fails against the previous implementation because it receives RuntimeException instead of IOException.

Validation:

mvn -Dtest=CacheUtilsTest test
mvn test
mvn verify
mvn verify -Prun-its-smoke
mvn verify -Prun-its

All tests pass.

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