feat: add Semaphore Sync job

Fetches Semaphore project inventory via Bearer auth, parses the
Ansible INI format to extract hostnames, and sets semaphore=1/0
on matching instances.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/api.test.js

@@ -585,4 +585,21 @@ describe('POST /api/jobs/:id/run', () => {
     const res = await request(app).post(`/api/jobs/${id}/run`)
     expect(res.status).toBe(500)
   })
+
+  it('semaphore_sync: parses ansible inventory and updates instances', async () => {
+    const semaphoreJob = {
+      key: 'semaphore_sync', name: 'Semaphore Sync', description: 'test',
+      enabled: 0, schedule: 60,
+      config: JSON.stringify({ api_url: 'http://semaphore:3000/api/project/1/inventory/1', api_token: 'bearer-token' }),
+    }
+    createJob(semaphoreJob)
+    const id = (await request(app).get('/api/jobs')).body[0].id
+    vi.stubGlobal('fetch', vi.fn().mockResolvedValueOnce({
+      ok: true,
+      json: async () => ({ inventory: '[production]\nplex\nhomeassistant\n' }),
+    }))
+    const res = await request(app).post(`/api/jobs/${id}/run`)
+    expect(res.status).toBe(200)
+    expect(res.body.summary).toMatch(/updated of/)
+  })
 })