chore: Add X-Connection-Id to fake client

[minhtule]

Changes

Add X-Connection-Id to fake client to make locally set up more similar to actual production set up.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.61%. Comparing base (ccec0a1) to head (d28b166).
⚠️ Report is 1 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #245      +/-   ##
==========================================
- Coverage   82.99%   82.61%   -0.39%     
==========================================
  Files          35       35              
  Lines        2628     2628              
==========================================
- Hits         2181     2171      -10     
- Misses        337      345       +8     
- Partials      110      112       +2     

Flag	Coverage Δ
integration	48.50% <ø> (-0.39%)	⬇️
unit	77.43% <ø> (ø)

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see 3 files with indirect coverage changes

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