## What changed?
Follow up to #7761:
1. Use more concrete types instead of `comparable`.
2. Use `softassert` for "compile" time errors.
3. Rename `chasm.Collection` to `chasm.Map` but left proto
`CollectionAttributes` intact. This will allow to add support for other
collection type in future (slice, array).
## Why?
It is better to narrow key type as much as possible. Other types are not
supported anyway.
## How did you test it?
- [ ] built
- [ ] run locally and tested manually
- [x] covered by existing tests
- [x] added new unit test(s)
- [ ] added new functional test(s)
