feat: browser access (allowed_origins, CORS with Private Network Access), job cancel, Tomie/Unity adapters, benchmark

Includes earlier uncommitted work: Tomie and Unity adapters, benchmark, structured output, call metrics.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

pyproject.toml

@@ -10,7 +10,7 @@ requires-python = ">=3.11"
 dependencies = ["fastapi>=0.115,<1", "pydantic>=2.9,<3", "httpx>=0.27,<1", "uvicorn>=0.30,<1"]
 
 [project.optional-dependencies]
-unity = ["UnityPy>=1.25,<2"]
+unity = ["UnityPy>=1.25,<2", "fonttools>=4,<5", "TypeTreeGeneratorAPI>=0.0.10,<0.1"]
 
 [project.scripts]
 local-translator = "local_translator.__main__:main"