feat: users update endpoint

[Dao-Ho]

PUT endpoint to update user. Only update phone_number for now

[codecov]

Codecov Report

❌ Patch coverage is 0% with 29 lines in your changes missing coverage. Please review.
✅ Project coverage is 24.23%. Comparing base (08f2ea4) to head (765ef68).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
backend/internal/repository/users.go	0.00%	16 Missing ⚠️
backend/internal/handler/users.go	0.00%	12 Missing ⚠️
backend/internal/service/server.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #216      +/-   ##
==========================================
- Coverage   24.79%   24.23%   -0.57%     
==========================================
  Files          37       37              
  Lines        1238     1267      +29     
==========================================
  Hits          307      307              
- Misses        927      956      +29     
  Partials        4        4              

Flag	Coverage Δ
backend	24.23% <0.00%> (-0.57%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
backend/internal/service/server.go	0.00% <0.00%> (ø)
backend/internal/handler/users.go	60.00% <0.00%> (-31.31%)	⬇️
backend/internal/repository/users.go	0.00% <0.00%> (ø)

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.