UUID生成器
RFC 4122準拠のランダムUUID v4を生成。
Nil / Max UUID
Nil UUID (all zeros)
00000000-0000-0000-0000-000000000000Max UUID (all f's)
ffffffff-ffff-ffff-ffff-ffffffffffffUUID v4 (Random)
12acd318-3045-47e1-931d-7eebfef882c936ded637-4b83-41d6-85b7-b6a3c860a7b2a4497092-d474-4499-8beb-d3cecc0683ff3eb1a8ed-151b-4337-9ea0-3564fb4d53425c7c8d07-8cd2-439b-b953-4dfaef965e49cf12d66d-4a89-48e4-adb1-4566d66a950fUUID v1 (Timestamp)
f1606960-5578-11f1-80e2-ad9a1c3fee59f1606960-5578-11f1-8379-d779409326c7f1606960-5578-11f1-a705-6b977597ce22f1606960-5578-11f1-8c0b-f18276155b15UUID v7 (Unix Timestamp)
019e4d2e-3af6-7d09-9e86-b99169d1169d019e4d2e-3af6-7ccd-a3d5-e54fd87cc991019e4d2e-3af6-781c-b23d-fda9fae0a218019e4d2e-3af6-7e54-ba6a-b3846eb7db7f