Release.seed_admin: ensure app started when run via bin/mv eval

Application.ensure_all_started(:mv) so Ash/Telemetry work (ETS table exists).
Fixes Unknown Error / telemetry_handler_table in production entrypoint.

lib/mv/release.ex

@@ -34,6 +34,9 @@ defmodule Mv.Release do
   @doc """
   Ensures an admin user exists from ENV (ADMIN_EMAIL, ADMIN_PASSWORD or ADMIN_PASSWORD_FILE).
 
+  Starts the application if not already running (required when called via `bin/mv eval`;
+  Ash/Telemetry need the running app). Idempotent.
+
   - If ADMIN_EMAIL is unset: no-op (idempotent).
   - If ADMIN_PASSWORD (and ADMIN_PASSWORD_FILE) are unset and the user does not exist:
     no user is created (no fallback password in production).
@@ -42,7 +45,11 @@ defmodule Mv.Release do
     `bin/mv eval "Mv.Release.seed_admin()"` to change the admin password without redeploying.
   """
   def seed_admin do
-    load_app()
+    # Ensure app (and Telemetry/Ash deps) are started when run via bin/mv eval
+    case Application.ensure_all_started(@app) do
+      {:ok, _} -> :ok
+      {:error, {app, reason}} -> raise "Failed to start #{inspect(app)}: #{inspect(reason)}"
+    end
 
     admin_email = get_env("ADMIN_EMAIL", nil)
     admin_password = get_env_or_file("ADMIN_PASSWORD", nil)