Fix component.label error in AGS frontend

[victordibia]

Fix issue here in this discussion - #4208 (comment)

Why are these changes needed?

Fix bug in AGS UI where frontend crashes because the default team config is null

• update /teams endpoint to always return a default team if none is found for the user
• update UI to check for team before rendering
• also update run_id type to be autoincrement int (similar to team id) instead of uuid. This helps side step the migration failed errors related to UUID type when using an sqlite backend

Related issue number

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://github.com./microsoft/autogen/blob/main/CONTRIBUTING.md to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.60%. Comparing base (7e5c115) to head (3e31b6d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5845   +/-   ##
=======================================
  Coverage   75.60%   75.60%           
=======================================
  Files         189      189           
  Lines       12734    12734           
=======================================
  Hits         9627     9627           
  Misses       3107     3107           

Flag	Coverage Δ
unittests	75.60% <ø> (ø)

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[ekzhu]

Hopefully we can convert back to using UUID in the future as auto increment ids tend to slow down at scale