Update codec for text fields to align with Jira API changes

[dspasojevic]

Summary

The io-ts codecs for Jira issue text fields need to be updated to handle changes in the Jira API response format.

Background

Jira's API has evolved and text fields (such as description, comment.body, etc.) may now return different formats depending on the Jira instance configuration (e.g., plain text vs. Atlassian Document Format/ADF).

Tasks

• Investigate current Jira API text field response formats
• Update codecs in lib/src/services/jira.ts to handle both legacy and new formats
• Add tests for the new codec handling

Related Files

• lib/src/services/jira.ts
• lib/src/codecs/