Lesson interface

[SanjinDedic]

tutorials can now link to lessons

[codecov]

Codecov Report

❌ Patch coverage is 96.91011% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 97.20%. Comparing base (8c9f883) to head (8057f4d).

Files with missing lines	Patch %	Lines
backend/routes/lesson/lesson_router.py	91.11%	4 Missing ⚠️
backend/routes/lesson/lesson_db.py	95.83%	3 Missing ⚠️
backend/tasks/exercise_task.py	77.77%	2 Missing ⚠️
...ts/integration/routes/lesson/test_lesson_router.py	97.18%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #296      +/-   ##
==========================================
+ Coverage   97.18%   97.20%   +0.01%     
==========================================
  Files         187      192       +5     
  Lines       15728    16084     +356     
==========================================
+ Hits        15286    15634     +348     
- Misses        442      450       +8     

Flag	Coverage Δ
backend	97.20% <96.91%> (+0.01%)	⬆️

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