Ruslan Nigmatullin ce6f7d9503 Allow model-facing ID sequences to resume from allocated IDs (#60732) ...

## Why

Resuming an ID sequence from a persisted ID requires its allocation position before shuffling. Previously, IDs stored only their salt and shuffled value.

## What changed

- Store the allocation `ordinal` in `ModelFacingId`, expose `salt()` and `ordinal()`, and derive `JsonSchema`.
- Add `ModelFacingIdGenerator::starting_at()` and `next_ordinal()` so callers can resume with the original seed and salt at the next allocation position without a generator snapshot.

## Testing

Update serialization coverage for the allocation fields and add a test that resumes from a serialized ID across the three-digit pool boundary, matching the uninterrupted sequence.

GitOrigin-RevId: 6cbb725c0bd08356c0dc5458021b9bf58a489522

2026-11-11 06:29:55 +00:00

..

generator.rs

Allow model-facing ID sequences to resume from allocated IDs (#60732)

2026-11-11 06:29:55 +00:00