Remove system_date_time from device optional fields

[waranlogesh]

system_date_time is an embeds_one field. It should not be part for device's cast fields list. This cause error casting embeds with cast/4 for :system_date_time field is not supported, use cast_embed/3 instead

[waranlogesh]

Before Fix

❯ mix test test/device_test.exs
Compiling 1 file (.ex)


  1) test to_struct/1 should parse given map to a valid device struct (Onvif.DeviceTest)
     test/device_test.exs:7
     ** (RuntimeError) casting embeds with cast/4 for :system_date_time field is not supported, use cast_embed/3 instead
     code: {:ok, device} = Onvif.Device.to_struct(device_map)
     stacktrace:
       (ecto 3.9.4) lib/ecto/changeset.ex:578: Ecto.Changeset.cast_type!/2
       (ecto 3.9.4) lib/ecto/changeset.ex:552: Ecto.Changeset.process_param/8
       (elixir 1.13.4) lib/enum.ex:2396: Enum."-reduce/3-lists^foldl/2-0-"/3
       (ecto 3.9.4) lib/ecto/changeset.ex:538: Ecto.Changeset.cast/6
       (onvif 0.3.4) lib/device.ex:88: Onvif.Device.changeset/2
       (onvif 0.3.4) lib/device.ex:65: Onvif.Device.to_struct/1
       test/device_test.exs:9: (test)



Finished in 0.02 seconds (0.02s async, 0.00s sync)
1 test, 1 failure

Randomized with seed 204547

After Fix

❯ mix test test/device_test.exs
Compiling 1 file (.ex)
.

Finished in 0.02 seconds (0.02s async, 0.00s sync)
1 test, 0 failures

Randomized with seed 62321

[waranlogesh]

Moved it to correct directory.

[hammeraj]

Nice find