Keep historical identifiers readable and addressable while generating all new entity IDs with Base62. Reject unsafe external ID references and preserve API keys and device codes during optional normalization.
* feat(ids)!: normalize persistent identifiers to Base62
BREAKING CHANGE: historical ZPan-owned IDs and public tokens require the one-time normalization migration; old public links and stored credentials are invalidated without runtime fallback.
* fix(ids): namespace public redirect tokens
Generate share tokens as s plus 11 Base62 characters and image tokens as i plus 11 Base62 characters. Dispatch /r by namespace prefix, reuse the single resolved record, and update migration validation, contracts, documentation, and tests.
* fix(ids): guard future object storage keys
* fix(ids): normalize historical references safely
saltbo