refactor: Web 服务器从 gunicorn 迁移到 uvicorn

backend/src/core/config/settings.py

@@ -8,6 +8,23 @@ from pydantic import BaseModel, Field, computed_field, field_validator, model_va
 from pydantic_settings import BaseSettings, SettingsConfigDict
 
 
+def _resolve_project_root() -> Path:
+    current = Path(__file__).resolve()
+    for parent in current.parents:
+        if (
+            (parent / "pyproject.toml").is_file()
+            and (parent / "backend").is_dir()
+            and (parent / "infra").is_dir()
+        ):
+            return parent
+
+    for parent in current.parents:
+        if parent.name == "backend":
+            return parent.parent
+
+    return Path.cwd().resolve()
+
+
 class RuntimeSettings(BaseModel):
     environment: Literal["dev", "test", "prod"] = "dev"
     service_name: str = "app"
@@ -171,6 +188,9 @@ def _resolve_env_file() -> str:
     return ".env"
 
 
+PROJECT_ROOT = _resolve_project_root()
+
+
 class Settings(BaseSettings):
     runtime: RuntimeSettings = RuntimeSettings()
     cors: CorsSettings = CorsSettings()