Change Channel to Source (#12)

* Ensure channel detail lookup doesn't download the video - oops

* Ran the needful migrations for replacing channels with sources

* got media source test back working

* channel tasks test

* Media indexing worker test

* media tests

* Got all tests working except controller tests

* got all tests working

* Renamed Channel struct to Source

* renamed ChannelTasks

* More renaming; renamed channel details module

* Removed Channel yt-dlp module, instead throwing things in the VideoCollection module

* Renamed what looks like the last of the outstanding data

lib/pinchflat/profiles/media_profile.ex

@@ -6,7 +6,7 @@ defmodule Pinchflat.Profiles.MediaProfile do
   use Ecto.Schema
   import Ecto.Changeset
 
-  alias Pinchflat.MediaSource.Channel
+  alias Pinchflat.MediaSource.Source
 
   @allowed_fields ~w(
     name
@@ -27,7 +27,7 @@ defmodule Pinchflat.Profiles.MediaProfile do
     field :embed_subs, :boolean, default: true
     field :sub_langs, :string, default: "en"
 
-    has_many :channels, Channel
+    has_many :sources, Source
 
     timestamps(type: :utc_datetime)
   end