fix: use correct struct field names when building check protobufs (#121)

check_type_config was returning `config: {:http, ...}` but the
Check struct has no :config field — it has :http, :tcp, :dns, :ssl
directly. This caused a KeyError crash in build_and_push_check_jobs.

Reviewed-on: graham/towerops-web#121

lib/towerops_web/channels/agent_channel.ex

@@ -910,54 +910,46 @@ defmodule ToweropsWeb.AgentChannel do
 
   defp check_type_config("http", config) do
     [
-      config:
-        {:http,
-         %HttpCheckConfig{
-           url: config["url"] || "",
-           method: config["method"] || "GET",
-           expected_status: config["expected_status"] || 200,
-           verify_ssl: config["verify_ssl"] != false,
-           regex: config["regex"] || "",
-           follow_redirects: config["follow_redirects"] != false
-         }}
+      http: %HttpCheckConfig{
+        url: config["url"] || "",
+        method: config["method"] || "GET",
+        expected_status: config["expected_status"] || 200,
+        verify_ssl: config["verify_ssl"] != false,
+        regex: config["regex"] || "",
+        follow_redirects: config["follow_redirects"] != false
+      }
     ]
   end
 
   defp check_type_config("tcp", config) do
     [
-      config:
-        {:tcp,
-         %TcpCheckConfig{
-           host: config["host"] || "",
-           port: config["port"] || 0,
-           send: config["send"] || "",
-           expect: config["expect"] || ""
-         }}
+      tcp: %TcpCheckConfig{
+        host: config["host"] || "",
+        port: config["port"] || 0,
+        send: config["send"] || "",
+        expect: config["expect"] || ""
+      }
     ]
   end
 
   defp check_type_config("dns", config) do
     [
-      config:
-        {:dns,
-         %DnsCheckConfig{
-           hostname: config["hostname"] || "",
-           server: config["server"] || "",
-           record_type: config["record_type"] || "A",
-           expected: config["expected"] || ""
-         }}
+      dns: %DnsCheckConfig{
+        hostname: config["hostname"] || "",
+        server: config["server"] || "",
+        record_type: config["record_type"] || "A",
+        expected: config["expected"] || ""
+      }
     ]
   end
 
   defp check_type_config("ssl", config) do
     [
-      config:
-        {:ssl,
-         %SslCheckConfig{
-           host: config["host"] || "",
-           port: config["port"] || 443,
-           warning_days: config["warning_days"] || 30
-         }}
+      ssl: %SslCheckConfig{
+        host: config["host"] || "",
+        port: config["port"] || 443,
+        warning_days: config["warning_days"] || 30
+      }
     ]
   end