fix(fam-edge): schema 对齐新架构 - parse_vlm_json 必填改 global_summary/events（兼容旧 frame_details/entities_json 转换）；NVIDIA PUT content-type 值改为 video/mp4 与 POST 一致（预签名校验）

fam-edge/src/fam_edge/model_adapters/nvidia_adapter.py

@@ -74,6 +74,7 @@ class NvidiaVisionAdapter(BaseModelAdapter):
 
     def _upload_asset(self, video_path: str) -> Optional[str]:
         """用 NVIDIA Assets API 上传大视频文件，返回 asset_id 供 video_url 引用。"""
+        content_type = "video/mp4"
         upload_timeout = max(self.timeout, 900)
         try:
             r = requests.post(
@@ -82,7 +83,7 @@ class NvidiaVisionAdapter(BaseModelAdapter):
                     "Authorization": f"Bearer {self.api_key}",
                     "Content-Type": "application/json",
                 },
-                json={"contentType": "video/mp4", "description": "fam-edge video asset"},
+                json={"contentType": content_type, "description": "fam-edge video asset"},
                 timeout=60,
             )
         except Exception as e:
@@ -106,8 +107,9 @@ class NvidiaVisionAdapter(BaseModelAdapter):
                 up = requests.put(
                     upload_url,
                     data=f,
-                    # 注意：必须用小写 header 名，预签名 S3 URL 的签名覆盖小写 content-type
-                    headers={"content-type": "application/octet-stream",
+                    # 必须全小写 header 名且 content-type 值与 POST 的 contentType 一致：
+                    # 预签名 S3 URL 签名覆盖这两个值，不一致会 SignatureDoesNotMatch
+                    headers={"content-type": content_type,
                              "x-amz-meta-nvcf-asset-description": "fam-edge video asset"},
                     timeout=upload_timeout,
                 )