fix(zdeploy): truncate the health-check body in the PASS line

Pointing the nextjs handler at Test-DeployHealth means the body is now
often an HTML page, not a line of JSON, so the PASS line dumped ~10 KB
of markup into the deploy output and buried everything after it.

Match on the full body as before, but print at most 200 characters plus
the byte count. A /health endpoint still prints in full.

CHECKSUMS.txt

@@ -8,7 +8,7 @@ c336a61cb8563736bd6550671d7dc90b14702a43f25a97b1ac15ffd64605fbf6  zbackup_ec2.cm
 20e6282901a919aa32ea717c739ba2dc9657426dff860f0e5fce201edefd99da  zchecksums.cmd
 692b7b0ff9e51e5d9b880358b33c54d2db4f967297a5350e154df1ce6f06ebc6  zchecksums.ps1
 b56085112e7c573926a70a58872163b71416d58ce91ea7114b1f5de5fc96c982  zdeploy.cmd
-df80a078ae1869626834245b7a1b9450ddf543fcb7cf78ba5d2dd04ae3bdf577  zdeploy.ps1
+c4189cef72368487af4524a00603967d7c8dc03c58ace5d4dd1e264ce1d22bd9  zdeploy.ps1
 fa817d3bd7bba98b03b411d3c5a82b210d3cca316ac0c9785afa5b4ac5fe0766  zec2.cmd
 5f70432af23df3459a98d9ad6a0da723783f2269dd5f5ab8ecdd6366ebc84942  zec2.ps1
 4df94eda29b6f5b2cb6bfa63e0add4d90ea24d936305f36a69988e8dd5d69154  zec2_rotatekeys.cmd

zdeploy.ps1

@@ -270,7 +270,11 @@ function Test-DeployHealth {
         $body = ($raw | Out-String).Trim()
         if ($LASTEXITCODE -eq 0 -and $body) {
             if (-not $expect -or $body.Contains($expect)) {
-                Write-Host "  PASS - $body" -ForegroundColor Green
+                # A /health endpoint returns a line of JSON; an app page returns
+                # kilobytes of HTML. Match on the whole body, but only print
+                # enough to recognise it — the rest is unreadable in a log.
+                $shown = if ($body.Length -gt 200) { $body.Substring(0, 200) + "... ($($body.Length) bytes)" } else { $body }
+                Write-Host "  PASS - $shown" -ForegroundColor Green
                 return $true
             }
             Write-Host "  Responding but '$expect' not found - waiting..." -ForegroundColor DarkYellow