feat: OCR 面单 enrichment flow (api/ocr/ + flows/sds/label_ocr.py + db OCR 方法)

api/ocr/client.py

@@ -0,0 +1,43 @@
+"""OCR 面单识别 Inference API 客户端(httpx,无鉴权)。
+
+端点: POST /recognize_url  JSON {url, country}
+"""
+
+from __future__ import annotations
+
+import httpx
+
+from api.ocr.models import OcrResult
+
+DEFAULT_BASE_URL = "http://192.168.124.92:9801"
+DEFAULT_TIMEOUT = 60.0
+
+
+class OcrClient:
+    """OCR 推理服务客户端。"""
+
+    def __init__(self, base_url: str = DEFAULT_BASE_URL, timeout: float = DEFAULT_TIMEOUT) -> None:
+        self._http = httpx.Client(base_url=base_url, timeout=timeout)
+
+    def recognize_url(self, url: str, country: str = "US") -> OcrResult:
+        """通过 PDF URL 识别面单,返回 OcrResult。"""
+        resp = self._http.post("/recognize_url", json={"url": url, "country": country})
+        resp.raise_for_status()
+        return OcrResult.model_validate(resp.json())
+
+    def health(self) -> bool:
+        """健康检查。"""
+        try:
+            resp = self._http.get("/health")
+            return resp.status_code == 200
+        except Exception:  # noqa: BLE001
+            return False
+
+    def close(self) -> None:
+        self._http.close()
+
+    def __enter__(self) -> "OcrClient":
+        return self
+
+    def __exit__(self, *exc: object) -> None:
+        self.close()