fix(router-api): restrict chain names to be short and only use ascii

[milapsheth]

Description

AXE-4592

AXE-4593

Todos

• [x] Unit tests
• [ ] Manual tests
• [x] Documentation
• [ ] Connect epics/issues

Steps to Test

Expected Behaviour

Other Notes

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.96%. Comparing base (f8318cd) to head (2250b68).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #565 +/- ## ======================================= Coverage 93.96% 93.96% ======================================= Files 190 190 Lines 26910 26925 +15 ======================================= + Hits 25286 25301 +15 Misses 1624 1624 ```

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