fix: set sane defaults for presence event limit

lib/realtime/api/tenant.ex

@@ -19,7 +19,7 @@ defmodule Realtime.Api.Tenant do
     field(:postgres_cdc_default, :string)
     field(:max_concurrent_users, :integer)
     field(:max_events_per_second, :integer)
-    field(:max_presence_events_per_second, :integer, default: 10_000)
+    field(:max_presence_events_per_second, :integer, default: 1000)
     field(:max_payload_size_in_kb, :integer, default: 3000)
     field(:max_bytes_per_second, :integer)
     field(:max_channels_per_client, :integer)

mix.exs

@@ -4,7 +4,7 @@ defmodule Realtime.MixProject do
   def project do
     [
       app: :realtime,
-      version: "2.51.9",
+      version: "2.51.10",
       elixir: "~> 1.17.3",
       elixirc_paths: elixirc_paths(Mix.env()),
       start_permanent: Mix.env() == :prod,

priv/repo/migrations/20250926223044_set_default_presence_value.exs

@@ -0,0 +1,10 @@
+defmodule Realtime.Repo.Migrations.SetDefaultPresenceValue do
+  use Ecto.Migration
+  @disable_ddl_transaction true
+  @disable_migration_lock true
+  def change do
+    alter table(:tenants) do
+      modify :max_presence_events_per_second, :integer, default: 1000
+    end
+  end
+end