Increase CIP-108 title length limit to 84

[mesudip]

Summary

• increase the CIP-108 title length limit from 80 to 84 characters
• port the exact patch from temp increase title length limit #4180 to develop
• retain the original commit provenance via cherry-pick -x

Why

PR #4180 was merged directly into main, while develop retained the previous 80-character limit. This keeps both branches aligned without merging unrelated main history into develop.

Impact

CIP-108 metadata titles containing 81–84 characters are accepted by the metadata validation service.

Validation

• npm run build — passed
• patch ID matches commit 16282f69293d77ff215f011189d4f148d65934ed
• one commit, one file, one insertion and one deletion relative to develop
• npm test -- --runInBand — utility tests pass; two existing app.service.test.ts assertions fail identically on untouched develop

Original PR: #4180