feat(server): send InvitationBlocked notification to workspace owner

[fengmk2]

[fengmk2]

[!WARNING] This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite. Learn more

• #11154 👈 (View in Graphite)
• #11158
• #11126
• canary

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 46.83544% with 42 lines in your changes missing coverage. Please review.

Project coverage is 53.84%. Comparing base (4d15c32) to head (96bf8fd). Report is 1248 commits behind head on canary.

Files with missing lines	Patch %	Lines
...es/backend/server/src/core/notification/service.ts	13.04%	20 Missing :warning:
packages/backend/server/src/models/notification.ts	66.66%	13 Missing :warning:
...ages/backend/server/src/plugins/license/service.ts	28.57%	5 Missing :warning:
...ckages/backend/server/src/core/notification/job.ts	60.00%	4 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           canary   #11154      +/-   ##
==========================================
- Coverage   54.49%   53.84%   -0.66%     
==========================================
  Files        2542     2542              
  Lines      115063   115133      +70     
  Branches    18755    18611     -144     
==========================================
- Hits        62703    61991     -712     
- Misses      51010    51211     +201     
- Partials     1350     1931     +581     

Flag	Coverage Δ
server-test	77.51% <46.83%> (-1.99%)	:arrow_down:
unittest	30.26% <ø> (-0.01%)	:arrow_down:

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