fix: resolve all remaining test failures

- Fix ApplicationSetting duplicate key constraint errors in BillingTest and AdminTest
  by deleting existing records before inserting new ones in tests
- Increase timeouts for agent_channel debounce tests from 75ms to 200ms
  to prevent flaky failures on slower systems (50ms debounce + processing time)

All 7633 tests now pass consistently across multiple runs.

test/towerops/admin_test.exs

@@ -796,6 +796,7 @@ defmodule Towerops.AdminTest do
       _org2 = organization_fixture(user.id, %{subscription_status: "active", stripe_subscription_id: "sub_2"})
 
       # Seed current settings
+      Repo.delete_all(from s in ApplicationSetting, where: s.key in ["default_free_devices", "default_price_per_device"])
       {:ok, _} = Repo.insert(%ApplicationSetting{key: "default_free_devices", value: "10", value_type: "integer"})
       {:ok, _} = Repo.insert(%ApplicationSetting{key: "default_price_per_device", value: "2.00", value_type: "string"})
 
@@ -868,6 +869,7 @@ defmodule Towerops.AdminTest do
 
       superuser = user_fixture(%{superuser: true})
 
+      Repo.delete_all(from s in ApplicationSetting, where: s.key in ["default_free_devices", "default_price_per_device"])
       {:ok, _} = Repo.insert(%ApplicationSetting{key: "default_free_devices", value: "10", value_type: "integer"})
       {:ok, _} = Repo.insert(%ApplicationSetting{key: "default_price_per_device", value: "2.00", value_type: "string"})
 

test/towerops/billing_test.exs

@@ -391,6 +391,9 @@ defmodule Towerops.BillingTest do
 
   describe "default_free_devices/0" do
     test "returns value from ApplicationSettings when set" do
+      # Clean up any existing setting first
+      Repo.delete_all(from s in ApplicationSetting, where: s.key == "default_free_devices")
+
       # Seed setting
       {:ok, _} =
         Repo.insert(%ApplicationSetting{
@@ -412,6 +415,9 @@ defmodule Towerops.BillingTest do
 
   describe "default_price_per_device/0" do
     test "returns value from ApplicationSettings when set" do
+      # Clean up any existing setting first
+      Repo.delete_all(from s in ApplicationSetting, where: s.key == "default_price_per_device")
+
       {:ok, _} =
         Repo.insert(%ApplicationSetting{
           key: "default_price_per_device",

test/towerops_web/channels/agent_channel_test.exs

@@ -533,7 +533,7 @@ defmodule ToweropsWeb.AgentChannelTest do
       send(socket.channel_pid, {:assignments_changed, :assigned})
 
       # Jobs push should come after debounce delay (50ms in test)
-      assert_push "jobs", %{binary: _jobs_binary}, 75
+      assert_push "jobs", %{binary: _jobs_binary}, 200
     end
 
     test "debounces rapid assignment changes", %{socket: socket} do
@@ -543,8 +543,8 @@ defmodule ToweropsWeb.AgentChannelTest do
       send(socket.channel_pid, {:assignments_changed, :assigned})
 
       # Should only get one push (debounced) - 50ms debounce in test
-      assert_push "jobs", %{binary: _}, 75
-      refute_push "jobs", %{}, 50
+      assert_push "jobs", %{binary: _}, 200
+      refute_push "jobs", %{}, 100
     end
   end