Initial commit on Forgejo

Fresh repository history for elektrine/tarakan hosted at
https://git.elektrine.com/elektrine/tarakan.

priv/repo/migrations/20260712040215_create_votes.exs

@@ -0,0 +1,22 @@
+defmodule Tarakan.Repo.Migrations.CreateVotes do
+  use Ecto.Migration
+
+  def change do
+    create table(:votes) do
+      add :account_id, references(:accounts, on_delete: :delete_all), null: false
+      # Polymorphic by (subject_type, subject_id): "finding" -> scan_findings,
+      # "comment" -> finding_comments. Kept generic so new votable kinds don't
+      # need a new table.
+      add :subject_type, :string, null: false
+      add :subject_id, :bigint, null: false
+      add :value, :integer, null: false
+
+      timestamps(type: :utc_datetime_usec)
+    end
+
+    # One standing vote per account per item; recasting updates value.
+    create unique_index(:votes, [:account_id, :subject_type, :subject_id])
+    create index(:votes, [:subject_type, :subject_id])
+    create constraint(:votes, :votes_value_must_be_unit, check: "value IN (-1, 1)")
+  end
+end