Add RAM and disk stats to health-status endpoint via SSH

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

updater/src/index.js

@@ -207,12 +207,27 @@ app.get('/health-status', async () => {
   return Promise.all(
     Object.entries(healthMap).map(async ([name, { host, port }]) => {
       const t0 = Date.now()
-      try {
-        await fetch(`http://${host}:${port}/health`, { signal: AbortSignal.timeout(3000) })
-        return { name, up: true, ms: Date.now() - t0 }
-      } catch {
-        return { name, up: false, ms: null }
+      const [httpResult, freeOut, dfOut] = await Promise.all([
+        fetch(`http://${host}:${port}/health`, { signal: AbortSignal.timeout(3000) })
+          .then(() => ({ up: true, ms: Date.now() - t0 }))
+          .catch(() => ({ up: false, ms: null })),
+        sshGet(host, ['free', '-b']),
+        sshGet(host, ['df', '-k', '/']),
+      ])
+
+      let ram = null
+      if (freeOut) {
+        const m = freeOut.match(/^Mem:\s+(\d+)\s+(\d+)/m)
+        if (m) ram = { total: +m[1], used: +m[2] }
       }
+
+      let disk = null
+      if (dfOut) {
+        const row = dfOut.trim().split('\n').pop().split(/\s+/)
+        if (row.length >= 3) disk = { total: +row[1] * 1024, used: +row[2] * 1024 }
+      }
+
+      return { name, ...httpResult, ram, disk }
     })
   )
 })