Class TimestampGenerator

Generates unique, monotonically increasing ISO 8601 timestamps with sub-millisecond precision.

Format: 2024-01-28T12:34:56.12345678Z where:

• Digits 1-3 (123): actual milliseconds from Date.now()
• Digits 4-7 (4567): monotonic counter (0000-9999)
• Digit 8 (8): random seed for distributed uniqueness (0-9)

This provides:

• 10,000 unique orderable timestamps per millisecond per instance
• 100,000 total combinations across distributed instances (10,000 counter values × 10 seeds)
• Standard ISO 8601 format parseable by any Date library
• Deterministic ordering via string comparison
• Random component for distributed uniqueness