[Bug] Recurring activities on Calendar

[clayandgen]

Recurring activities appeared in the Calendar UI but failed to execute because:

1. All recurring activities shared the same UUID, so not_queued? skipped all but the first
2. The creation notification only contained the last activity's data, so others weren't loaded into the schedule

Solution:

• Generate unique UUID for each recurring activity instance (activity_model.rb)
• Trigger schedule refresh when recurring activity is created (timeline_microservice.rb) (Enterprise)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.17%. Comparing base (7f1bdd9) to head (37fffdf).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2756   +/-   ##
=======================================
  Coverage   79.17%   79.17%           
=======================================
  Files         670      670           
  Lines       54278    54279    +1     
  Branches      734      734           
=======================================
+ Hits        42972    42976    +4     
+ Misses      11226    11223    -3     
  Partials       80       80           

Flag	Coverage Δ
python	80.97% <ø> (+<0.01%)	⬆️
ruby-api	83.61% <ø> (ø)
ruby-backend	82.20% <100.00%> (+<0.01%)	⬆️

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud