fix: update upload_scanner to use Rust info-privacy-rs service

- Change target URL to port 8001 (RKNN-accelerated Rust service)
- Fix redact API call: pass config as JSON field instead of form data
  Rust API requires: -F 'config={"redact_types":["id_card",...]}'
- Discovery: info-privacy-rs already running on device with full
  PDF/DOCX/XLSX support and RKNN face detection

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

services/privacy_gateway/upload_scanner.py

@@ -12,7 +12,7 @@ from dataclasses import dataclass
 
 import httpx
 
-_INFO_PRIVACY_BASE = "http://localhost:8000/api/v1"
+_INFO_PRIVACY_BASE = "http://localhost:8001/api/v1"  # Rust info-privacy-rs (RKNN accelerated)
 _REDACT_TYPES = ["id_card", "phone", "bank_card", "email", "license_plate", "name", "address", "face"]
 
 
@@ -59,11 +59,12 @@ async def scan_and_redact(filename: str, raw_bytes: bytes) -> ScanResult:
                 original_hash=original_hash,
             )
 
-        # Step 2: 脱敏
+        # Step 2: 脱敏（Rust API 需要 config JSON 字段指定脱敏类型）
+        import json as _json
         redact_resp = await client.post(
             f"{_INFO_PRIVACY_BASE}/redact",
             files={"file": (filename, io.BytesIO(raw_bytes))},
-            data={"redact_types": list(summary.keys())},
+            data={"config": _json.dumps({"redact_types": list(summary.keys())})},
         )
         if redact_resp.status_code != 200:
             return ScanResult(