Download cutoff date for sources (#69)

* Added new uploaded_at column to media items

* Updated indexer to pull upload date

* Updates media item creation to update on conflict

* Added download cutoff date to sources

* Applies cutoff date logic to pending media logic

* Updated docs

priv/repo/migrations/20240310230713_add_uploaded_at_to_media_items.exs

@@ -0,0 +1,12 @@
+defmodule Pinchflat.Repo.Migrations.AddUploadedAtToMediaItems do
+  use Ecto.Migration
+
+  def change do
+    alter table(:media_items) do
+      # Setting default to unix epoch so I can enforce not null BUT also easily
+      # identify records that were created before this column was added.
+      # Not a DateTime because yt-dlp only returns the date
+      add :upload_date, :date, default: "1970-01-01", null: false
+    end
+  end
+end

priv/repo/migrations/20240311033214_add_download_cutoff_date_to_sources.exs

@@ -0,0 +1,9 @@
+defmodule Pinchflat.Repo.Migrations.AddDownloadCutoffDateToSources do
+  use Ecto.Migration
+
+  def change do
+    alter table(:sources) do
+      add :download_cutoff_date, :date
+    end
+  end
+end