Fetch file sizes of the content on PDP

[yogeshVU]

We need to fetch file sizes of the data on the PDP. This will be helpful in scenarios where we may want to disable downloading of large file sizes through the dashboard.

[yogeshVU]

One can fetch the files metadata for the given observation in PDP using /v2/Files/GetObservationFilesMetadata.:

https://leappremonitiondev.azurewebsites.net/v2/Files/GetObservationFilesMetadata?processId=0f2f4cae-2f22-42a0-aa6e-c708bad562a6&obsIndex=10 

Here is an example response json

[
  {
    "name": "10/0/asdasd.tar.gz",
    "sasUrl": null,
    "length": 23683136428,
    "hash": null
  }
]

The length presents the data in bytes..