init commit

lib/workload_service/projections/task.ex

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+defmodule WorkloadService.Projections.Task do
+  @moduledoc """
+  Ecto schema for the task read model.
+  ID format: "org_id:type:task_id" (e.g., "test:quote:uuid")
+  """
+
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  @derive {Flop.Schema,
+           filterable: [:status, :org_id, :application_id, :provider_id],
+           sortable: [:inserted_at, :updated_at, :status]}
+
+  @primary_key {:id, :string, []}
+  schema "tasks" do
+    field(:org_id, :string)
+    field(:application_id, :string)
+    field(:provider_id, :string)
+    field(:provider_name, :string)
+    field(:task_info, :map)
+    field(:submission, :map)
+    field(:attachments, {:array, :string})
+    field(:status, :string)
+    field(:version, :integer, default: 1)
+
+    timestamps(type: :utc_datetime)
+  end
+
+  @statuses ["created", "draft", "approved", "completed"]
+
+  def status_changeset(task, attrs) do
+    task
+    |> cast(attrs, [:status, :task_info, :submission, :attachments, :updated_at])
+    |> validate_inclusion(:status, @statuses)
+  end
+
+  def create_changeset(task, attrs) do
+    task
+    |> cast(attrs, [
+      :id,
+      :org_id,
+      :application_id,
+      :provider_id,
+      :provider_name,
+      :task_info,
+      :submission,
+      :attachments,
+      :status,
+      :version
+    ])
+    |> validate_required([
+      :id,
+      :org_id,
+      :application_id,
+      :provider_id,
+      :provider_name,
+      :status
+    ])
+    |> validate_inclusion(:status, @statuses)
+  end
+end