fix: increase walker concurrent test timeout, prefix unused vars, add heex to dialyzer ignore

.dialyzer_ignore.exs

@@ -44,5 +44,6 @@
   # Ignore unknown_function and unknown_type warnings from Ecto/Plug/Phoenix
   # These are false positives - the functions exist but aren't in the PLT
   ~r/lib\/towerops.*\.ex/,
+  ~r/lib\/towerops.*\.heex/,
   ~r/lib\/mix\/tasks.*\.ex/
 ]

test/snmpkit/snmp_lib/walker_test.exs

@@ -240,7 +240,7 @@ defmodule SnmpKit.SnmpLib.WalkerTest do
           end)
         end)
 
-      results = Task.await_many(tasks, 1000)
+      results = Task.await_many(tasks, 10_000)
 
       # All should complete (with errors due to invalid host)
       assert length(results) == 3

test/towerops/pagerduty/client_test.exs

@@ -5,14 +5,14 @@ defmodule Towerops.PagerDuty.ClientTest do
 
   describe "trigger/5" do
     test "builds correct event body" do
-      alert = %{
+      _alert = %{
         id: "abc-123",
         alert_type: :device_down,
         triggered_at: ~U[2024-01-15 10:30:00Z],
         message: "Device is not responding to ping"
       }
 
-      device = %{
+      _device = %{
         id: "dev-456",
         hostname: "router-01",
         ip_address: "10.0.0.1",