fix: serde support for Height without revision_number

[rnbguy]

Closes: #1262

Description

Makes revision_number field optional for Height struct when deserializing via serde -- specifically for JSON.

---

PR author checklist:

• Added changelog entry, using unclog.
• Added tests.
• Linked to GitHub issue.
• Updated code comments and documentation (e.g., docs/).
• Tagged one reviewer who will be the one responsible for shepherding this PR.

Reviewer checklist:

• Reviewed Files changed in the GitHub PR explorer.
• Manually tested (in case integration/unit/mock tests are absent).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.14%. Comparing base (a5f9fbf) to head (73698b0).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1397   +/-   ##
=======================================
  Coverage   67.13%   67.14%           
=======================================
  Files         226      226           
  Lines       22455    22464    +9     
=======================================
+ Hits        15075    15083    +8     
- Misses       7380     7381    +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[Farhad-Shabani]

Thanks for following up on this and resolving it!