feat(models-http-api): add rate limit support for embedding

[zwpaper]

[codecov]

Codecov Report

Attention: Patch coverage is 6.66667% with 70 lines in your changes missing coverage. Please review.

Project coverage is 63.16%. Comparing base (8bcaf05) to head (e660de9).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/http-api-bindings/src/embedding/mod.rs	0.00%	50 Missing ⚠️
crates/http-api-bindings/src/embedding/openai.rs	0.00%	7 Missing ⚠️
crates/http-api-bindings/src/embedding/voyage.rs	0.00%	7 Missing ⚠️
crates/http-api-bindings/src/embedding/llama.rs	0.00%	3 Missing ⚠️
crates/ollama-api-bindings/src/embedding.rs	0.00%	2 Missing ⚠️
crates/tabby-common/src/config.rs	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3466      +/-   ##
==========================================
- Coverage   63.31%   63.16%   -0.16%     
==========================================
  Files         193      193              
  Lines       22019    22111      +92     
==========================================
+ Hits        13941    13966      +25     
- Misses       8078     8145      +67     

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