chore(server): update backend configuration files

- pyproject.toml: update project dependencies and metadata
- config.py: update application configuration settings
- openapi.py: update OpenAPI documentation

server/src/app/core/config.py

@@ -67,6 +67,18 @@ class Settings(BaseSettings):
     log_dir: str = Field(default="logs", alias="LOG_DIR")
     log_file_enabled: bool = Field(default=True, alias="LOG_FILE_ENABLED")
     storage_root_dir: str = Field(default="storage", alias="STORAGE_ROOT_DIR")
+    ocr_python_bin: str = Field(default="", alias="OCR_PYTHON_BIN")
+    ocr_timeout_seconds: int = Field(default=180, alias="OCR_TIMEOUT_SECONDS")
+    ocr_max_file_size_mb: int = Field(default=20, alias="OCR_MAX_FILE_SIZE_MB")
+    ocr_language: str = Field(default="ch", alias="OCR_LANGUAGE")
+    ocr_text_detection_model: str = Field(
+        default="PP-OCRv5_mobile_det",
+        alias="OCR_TEXT_DETECTION_MODEL",
+    )
+    ocr_text_recognition_model: str = Field(
+        default="PP-OCRv5_mobile_rec",
+        alias="OCR_TEXT_RECOGNITION_MODEL",
+    )
 
     @property
     def resolved_database_url(self) -> str:
@@ -85,6 +97,10 @@ class Settings(BaseSettings):
             path = SERVER_DIR / path
         return path.resolve()
 
+    @property
+    def resolved_ocr_temp_dir(self) -> Path:
+        return (self.resolved_storage_root_dir / "ocr_temp").resolve()
+
 def _resolve_env_files() -> tuple[Path, ...]:
     env_files = Settings.model_config.get("env_file") or ()
     return tuple(Path(item) for item in env_files)