Add feature: new property snowflake to Hashable class.

[yatochka-dev]

Summary

Checklist

• If code changes were made, then they have been tested
  • I have updated the documentation to reflect the changes
  • I have formatted the code properly by running task lint
  • I have type-checked the code by running task pyright
• This PR fixes an issue
• This PR adds something new (e.g. new method or parameters)
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, ...)

[shiftinv]

Not entirely sold on this addition yet; what issue does it solve, as opposed to using f"{o.id}"/str(o.id) directly? In terms of performance, it's about the same as str(o.id), as both are function calls in the end.

The naming is slightly confusing, "snowflake" doesn't necessarily have to mean "string" in general.