Fix flaky UniqueIdGeneratorTest timing tests

- Increase threshold from 2ms to 50ms for testIDtoDate and testIDtoInstant
- CI environments can have thread scheduling delays exceeding 2ms

Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>

Author: Claude4.0o

changelog.md

@@ -4,6 +4,8 @@
 * **MAINTENANCE**: Fixed flaky `IOUtilitiesProtocolValidationTest.testProtocolValidationPerformance` test
   * Added warmup iterations to allow JIT compilation before timing
   * Increased threshold from 100ms to 500ms for CI environments with variable performance
+* **MAINTENANCE**: Fixed flaky `UniqueIdGeneratorTest` timing tests
+  * Increased threshold from 2ms to 50ms for CI environments with thread scheduling delays
 
 #### 4.90.0 2026-02-02
 * **BUG FIX**: `DeepEquals` - URL comparison now uses string representation instead of `URL.equals()`

src/test/java/com/cedarsoftware/util/UniqueIdGeneratorTest.java

@@ -66,11 +66,12 @@ void testIDtoDate()
     {
         long id = getUniqueId();
         Date date = getDate(id);
-        assert abs(date.getTime() - currentTimeMillis()) < 2;
+        // Use generous threshold for CI environments with thread scheduling delays
+        assert abs(date.getTime() - currentTimeMillis()) < 50;
 
         id = getUniqueId19();
         date = getDate19(id);
-        assert abs(date.getTime() - currentTimeMillis()) < 2;
+        assert abs(date.getTime() - currentTimeMillis()) < 50;
     }
 
     @Test
@@ -79,12 +80,13 @@ void testIDtoInstant()
         long id = getUniqueId();
         long currentTime = currentTimeMillis();
         Instant instant = getInstant(id);
-        assert abs(instant.toEpochMilli() - currentTime) <= 2;
+        // Use generous threshold for CI environments with thread scheduling delays
+        assert abs(instant.toEpochMilli() - currentTime) <= 50;
 
         id = getUniqueId19();
         instant = getInstant19(id);
         currentTime = currentTimeMillis();
-        assert abs(instant.toEpochMilli() - currentTime) <= 2;
+        assert abs(instant.toEpochMilli() - currentTime) <= 50;
     }
 
     @Test