Force creation of a new trace in continue_trace with empty headers

[sl0thentr0py]

No description provided.

[sentrivana]

See comment, else lgtm

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.01%. Comparing base (c27ac1f) to head (78e2417).
⚠️ Report is 8 commits behind head on potel-base.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@              Coverage Diff               @@
##           potel-base    #4682      +/-   ##
==============================================
+ Coverage       83.75%   85.01%   +1.25%     
==============================================
  Files             158      158              
  Lines           15517    15540      +23     
  Branches         2456     2461       +5     
==============================================
+ Hits            12997    13212     +215     
+ Misses           1765     1572     -193     
- Partials          755      756       +1     

Files with missing lines	Coverage Δ
sentry_sdk/opentelemetry/scope.py	96.11% <100.00%> (+0.03%)	⬆️

... and 15 files with indirect coverage changes