Improve .llm code coverage

[xnuohz]

[codecov]

Codecov Report

❌ Patch coverage is 40.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.44%. Comparing base (c211214) to head (7bc110c).
⚠️ Report is 133 commits behind head on master.

Files with missing lines	Patch %	Lines
torch_geometric/llm/models/g_retriever.py	0.00%	2 Missing ⚠️
torch_geometric/llm/models/llm.py	0.00%	1 Missing ⚠️

❌ Your patch check has failed because the patch coverage (40.00%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #10516      +/-   ##
==========================================
- Coverage   86.11%   85.44%   -0.68%     
==========================================
  Files         496      510      +14     
  Lines       33655    35964    +2309     
==========================================
+ Hits        28981    30728    +1747     
- Misses       4674     5236     +562     

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