Initial commit: Infrastructure host tracking app

Fastify + node:sqlite single-process app with vanilla JS UI for
looking up hosts by hardware ID, hostname, or asset ID. Includes
per-host network interface tracking, sites/rooms/server-types CRUD,
Docker packaging, and a Gitea Actions workflow that runs tests then
builds and pushes to gitea.thewrightserver.net/josh/infrastructure.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/helpers.js

@@ -0,0 +1,37 @@
+import { buildApp } from '../src/server.js';
+
+export async function newApp() {
+  return buildApp({ dbPath: ':memory:', seed: false });
+}
+
+export async function seedFixtures(app) {
+  const site  = JSON.parse((await app.inject({
+    method: 'POST', url: '/api/sites', payload: { name: 'HQ' },
+  })).body);
+  const room  = JSON.parse((await app.inject({
+    method: 'POST', url: '/api/rooms', payload: { site_id: site.id, name: 'Main' },
+  })).body);
+  const type  = JSON.parse((await app.inject({
+    method: 'POST', url: '/api/server-types', payload: { name: 'Web' },
+  })).body);
+  return { site, room, type };
+}
+
+export function newHostPayload({ room_id, server_type_id }, suffix = '') {
+  return {
+    hardware_id:    `HW-${suffix || '1'}`,
+    hostname:       `host-${suffix || '1'}`,
+    asset_id:       `AST-${suffix || '1'}`,
+    room_id,
+    position:       'R1-U1',
+    server_type_id,
+  };
+}
+
+export async function seedHost(app, fx, suffix = '') {
+  const res = await app.inject({
+    method: 'POST', url: '/api/hosts',
+    payload: newHostPayload({ room_id: fx.room.id, server_type_id: fx.type.id }, suffix),
+  });
+  return JSON.parse(res.body);
+}