feat: add logging for fraction lifecycle

[eguguchkin]

---

• I have read and followed all requirements in CONTRIBUTING.md;
• I used LLM/AI assistance to make this pull request;

[codecov-commenter]

Codecov Report

❌ Patch coverage is 55.00000% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.55%. Comparing base (98c583d) to head (79e8e5d).

Files with missing lines	Patch %	Lines
fracmanager/lifecycle_manager.go	55.00%	8 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #450      +/-   ##
==========================================
- Coverage   70.67%   70.55%   -0.12%     
==========================================
  Files         226      226              
  Lines       17611    17629      +18     
==========================================
- Hits        12447    12439       -8     
- Misses       4238     4258      +20     
- Partials      926      932       +6     

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