Use past meetings to calc. estimated meeting size for LB

[samuelwei]

Fixes #2316

Type

• Bugfix
• Feature
• Documentation
• Refactoring (e.g. Style updates, Test implementation, etc.)
• Other (please describe):

Checklist

• Code updated to current develop branch head
• Passes CI checks
• Is a part of an issue
• Tests added for the bugfix or newly implemented feature, describe below why if not
• Changelog is updated
• Documentation of code and features exists

Changes

• Added estimated max. meeting size calculation based on previous meetings
• Added bbb-meeting-size-hint meta parameter
• Changed server load calculation to prefer a given bbb-meeting-size-hint meta parameter over a fixed value during meeting startup

Other information

[coderabbitai]

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✨ Finishing Touches

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• Commit unit tests in branch 2316-save-avg-meeting-size-to-improve-lb

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.65%. Comparing base (08352f2) to head (46af069).

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #3212      +/-   ##
=============================================
+ Coverage      97.13%   97.65%   +0.51%     
=============================================
  Files            476      189     -287     
  Lines          16502     9699    -6803     
  Branches        2402     2402              
=============================================
- Hits           16030     9472    -6558     
+ Misses           472      227     -245     

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[cypress]

PILOS    Run #3095

Run Properties:   Failed #3095  •  46af0691a5: Use past meetings to calc. estimated meeting size for LB

Project	PILOS
Branch Review	2316-save-avg-meeting-size-to-improve-lb
Run status	Failed #3095
Run duration	07m 41s
Commit	46af0691a5: Use past meetings to calc. estimated meeting size for LB
Committer	Samuel Weirich
View all properties for this run ↗︎

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Test results
Failures	1
Flaky	0
Pending	0
Skipped	0
Passing	634
View all changes introduced in this branch ↗︎

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Tests for review

  e2e/RoomsJoinWithLobby.cy.js • 1 failed test • System tests

View Output

Test		Artifacts
Room Join with lobby settings > Lobby enabled		Test Replay Screenshots