v0.1.8: feat: upgrade to SLSA v1.1 provenance specification

- Update predicate type from https://slsa.dev/provenance/v0.2 to https://slsa.dev/provenance/v1
- Implement new SLSA v1.1 interfaces with buildDefinition and runDetails structure
- Maintain backward compatibility with v0.2 validation
- Update TEE client to use v1.1 predicate type
- Enhanced logging to show 'SLSA v1.1 Provenance Details'

This update aligns with the latest SLSA specification for improved supply chain security.