- Add check-did.sh to verify DID registration using admin JWT auth
- Fix JWT signing in generate-test-claim.sh to match uport-credentials format
- Clean up DID extraction in run-deeplink-tests.sh
- Add proper error handling and response parsing
The changes improve test script reliability by:
1. Using consistent JWT signing across scripts
2. Adding ability to verify DID registration status
3. Simplifying DID info extraction
4. Adding better error messages and debug output