Bump jjwt.version from 0.12.6 to 0.13.0

[Copilot]

Description

Bumps jjwt.version from 0.12.6 to 0.13.0.

Breaking change in jjwt 0.13.0: When optional jjwt-impl/jjwt-jackson dependencies are missing, the library now throws ExceptionInInitializerError during static initialization instead of UnknownClassException at runtime.

Fix: Updated Statement.signAndBuild() catch block to handle both exception types:

} catch (final UnknownClassException | ExceptionInInitializerError e) {

Checklist:

• Public methods are documented
• Public methods are tested
• New and existing tests pass when run locally
• There are no new warnings or errors

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[Copilot]

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