Harden IIS deploy script auth, smoke test, and 32-bit ACE OLEDB handling

- scp/ssh now force a fallback to password auth so a missing/rejected
  key fails with a real prompt instead of an opaque "Permission denied
  (publickey)".
- Smoke test now checks each path against its expected status (/404 is
  expected to 404) instead of treating any non-throwing response as a
  pass, and surfaces the actual failure reason.
- The remote IIS server has the 64-bit Access Database Engine, unlike
  the local dev machine, so its app pool stays 64-bit and migrations
  run through the plain (64-bit) cscript.exe instead of SysWOW64.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

scripts/deploy-iis-remote-apply.ps1

@@ -65,11 +65,15 @@ icacls $dataDir /grant ("IIS AppPool\" + $AppPool + ":(OI)(CI)(M)") /T | Out-Nul
 Set-ItemProperty ('IIS:\Sites\' + $SiteName) -Name physicalPath -Value $publicDir
 Set-ItemProperty ('IIS:\Sites\' + $SiteName) -Name applicationPool -Value $AppPool
 
+# This server has the 64-bit Access Database Engine (ACE OLEDB) installed, unlike the local
+# dev machine, which needs the 32-bit one - so the app pool stays 64-bit here.
+Set-ItemProperty ('IIS:\AppPools\' + $AppPool) -Name enable32BitAppOnWin64 -Value $false
+
 if($RunMigrations){
   Write-Host 'Running pending migrations'
   Push-Location $RemoteDir
   try {
-    & C:\Windows\SysWOW64\cscript.exe //nologo scripts\runMigrations.vbs up
+    & cscript.exe //nologo scripts\runMigrations.vbs up
     if($LASTEXITCODE -ne 0){ throw 'runMigrations.vbs up failed - see output above' }
   } finally {
     Pop-Location

scripts/deploy-iis.ps1

@@ -76,12 +76,20 @@ $remoteZip = 'C:\Windows\Temp\' + $zipName
 $remoteApplyScript = Join-Path $PSScriptRoot 'deploy-iis-remote-apply.ps1'
 $remoteApplyDest = 'C:\Windows\Temp\deploy-iis-remote-apply.ps1'
 
+# Force a fall-through to password auth: if pubkey auth isn't set up (or an agent offers a
+# key the server doesn't accept), plain ssh/scp can otherwise fail outright with
+# "Permission denied (publickey)" instead of ever prompting for a password.
+$AuthOpts = @(
+  '-o', 'PreferredAuthentications=publickey,keyboard-interactive,password',
+  '-o', 'NumberOfPasswordPrompts=3'
+)
+
 Write-Host "Copying release to $RemoteTarget"
-& $ScpExe -P $RemotePort $localZip "${RemoteTarget}:$remoteZip"
-if($LASTEXITCODE -ne 0){ throw 'scp of release zip failed' }
+& $ScpExe -P $RemotePort @AuthOpts $localZip "${RemoteTarget}:$remoteZip"
+if($LASTEXITCODE -ne 0){ throw 'scp of release zip failed - see scp output above for the actual reason' }
 
-& $ScpExe -P $RemotePort $remoteApplyScript "${RemoteTarget}:$remoteApplyDest"
-if($LASTEXITCODE -ne 0){ throw 'scp of remote-apply script failed' }
+& $ScpExe -P $RemotePort @AuthOpts $remoteApplyScript "${RemoteTarget}:$remoteApplyDest"
+if($LASTEXITCODE -ne 0){ throw 'scp of remote-apply script failed - see scp output above for the actual reason' }
 
 # --- 3. Apply on the remote host ---
 $remoteCommandParts = @(
@@ -96,8 +104,8 @@ $remoteCommandParts = @(
 if($RunMigrations){ $remoteCommandParts += '-RunMigrations' }
 
 Write-Host "Applying release on $RemoteTarget"
-& $SshExe -p $RemotePort $RemoteTarget ($remoteCommandParts -join ' ')
-if($LASTEXITCODE -ne 0){ throw 'remote apply failed' }
+& $SshExe -p $RemotePort @AuthOpts $RemoteTarget ($remoteCommandParts -join ' ')
+if($LASTEXITCODE -ne 0){ throw 'remote apply failed - see ssh output above for the actual reason' }
 
 # --- 4. Local cleanup ---
 Remove-Item $localZip -ErrorAction SilentlyContinue
@@ -105,11 +113,38 @@ Remove-Item -Recurse -Force $outDir -ErrorAction SilentlyContinue
 
 # --- 5. Smoke test ---
 Write-Host 'Smoke testing...'
-$paths = @('/', '/request-order', '/404')
-foreach($path in $paths){
-  $url = $BaseUrl.TrimEnd('/') + $path
-  $response = Invoke-WebRequest -UseBasicParsing -Uri $url -TimeoutSec 30
-  Write-Host ("OK  " + $path + ' -> ' + $response.StatusCode)
+# /404 is the app's own not-found route - a 404 there is correct, not a failure.
+$checks = @(
+  @{ Path = '/'; Expect = 200 },
+  @{ Path = '/request-order'; Expect = 200 },
+  @{ Path = '/404'; Expect = 404 }
+)
+$failed = $false
+foreach($check in $checks){
+  $url = $BaseUrl.TrimEnd('/') + $check.Path
+  try {
+    $response = Invoke-WebRequest -UseBasicParsing -Uri $url -TimeoutSec 30
+    $status = [int]$response.StatusCode
+  } catch {
+    if($_.Exception.Response){
+      $status = [int]$_.Exception.Response.StatusCode
+    } else {
+      Write-Host ("FAIL " + $check.Path + ' -> request failed: ' + $_.Exception.Message)
+      $failed = $true
+      continue
+    }
+  }
+
+  if($status -eq $check.Expect){
+    Write-Host ("OK   " + $check.Path + ' -> ' + $status)
+  } else {
+    Write-Host ("FAIL " + $check.Path + ' -> ' + $status + ' (expected ' + $check.Expect + ')')
+    $failed = $true
+  }
+}
+
+if($failed){
+  throw 'Smoke test failed - see above'
 }
 
 Write-Host 'Deploy complete.'