{"input": "UPI0000000001", "source_db": "uniparc", "how": "remote", "expect": {"valid": true, "normalized": "UPI0000000001"}, "note": "a real unique sequence"}
{"input": "UPI0000000002", "source_db": "uniparc", "how": "remote", "expect": {"valid": true, "normalized": "UPI0000000002"}, "note": "a real unique sequence"}
{"input": "UPI0000000000", "source_db": "uniparc", "how": "remote", "expect": {"valid": false}, "note": "well-formed but no such sequence"}
{"input": "upi0000000001", "source_db": "uniparc", "how": "remote", "expect": {"valid": false, "suggestion": "UPI0000000001"}, "note": "lowercase; the canonical uppercase form exists remotely"}
{"input": "UPI000000000G", "source_db": "uniparc", "how": "remote", "expect": {"valid": false}, "note": "G is not hexadecimal; fails the grammar before any lookup"}
