Feature: tinyTikTok ID生成器

**Is your feature request related to a problem? Please describe.**
ID 生成可能会导致冲突，需要保证其唯一性

**Describe the solution you'd like**
- [ ] 分布式雪花算法
- [ ] 可配置

**Describe alternatives you've considered**
None

**Additional context**
None

The issue names no files, tests, or entry points. Start by locating the current ID-generation code, then determine how a distributed Snowflake algorithm and configuration should fit the project; done means IDs are unique across distributed instances and the generator is configurable.

Written by the indexing model from the issue text.