ci: fix Windows Tor bundle — drop PS7-only params from Invoke-WebRequest

The hardened PowerShell retry loop from 2c2efd8 passed -ConnectionTimeout
and -OperationTimeout to Invoke-WebRequest. Those are PowerShell 7+ only;
GitHub Actions Windows runners ship PowerShell 5.1, which rejected them
with 'ParentContainsErrorRecordException / NamedParameterNotFound' on
the first iteration of the loop, and the catch block silently counted
the syntax error as a 'failed attempt' instead of a script bug.

Result on run #28689210122: both Windows jobs (build-windows-qt,
build-windows-daemon) failed at 'Download Tor' / 'Bundle Tor for daemon'
with exit code 1 before any HTTP traffic happened. macOS + Linux passed.

Fix:
* Drop -ConnectionTimeout and -OperationTimeout (PS7-only).
* Restructure the retry loop: explicit $downloaded flag, remove the
  part-file on each attempt, throw explicitly at the end if all 3
  attempts produced no usable file. The size check (>1MB) still
  rejects 0-byte / truncated '200 OK' responses.
* Add a comment at the top of each step explaining the PS 5.1 limitation
  so the next agent doesn't re-add the PS7 params.

.github/workflows/build-all.yml

@@ -288,9 +288,11 @@ jobs:
       - name: Download Tor
         # Resilient download: archive.torproject.org occasionally times out
         # from CI egress (observed 2026-07-03: macOS job exit code 6 after
-        # exactly 30s of curl hang). Retries cover transient connection
-        # drops; -SkipHttpErrorCheck surfaces HTTP error bodies so the next
-        # failure isn't silent.
+        # exactly 30s of curl hang). Retries cover transient connection drops;
+        # size check rejects 0-byte "200 OK" responses from broken mirrors.
+        # NOTE: Invoke-WebRequest on PowerShell 5.1 (default on Windows-latest
+        # runners) does NOT accept -ConnectionTimeout/-OperationTimeout — those
+        # are PowerShell 7+. We rely on the retry loop + size check only.
         shell: powershell
         run: |
           $TOR_VERSION = "15.0.9"
@@ -298,21 +300,25 @@ jobs:
           $torPath = "tor-bundle.tar.gz"
           $attempts = 0
           $maxAttempts = 3
-          while ($attempts -lt $maxAttempts) {
+          $downloaded = $false
+          while ($attempts -lt $maxAttempts -and -not $downloaded) {
             $attempts++
             try {
-              Invoke-WebRequest -Uri $TOR_URL -OutFile $torPath -UseBasicParsing `
-                -ConnectionTimeout 15 -OperationTimeout 120
+              if (Test-Path $torPath) { Remove-Item $torPath -ErrorAction SilentlyContinue }
+              Invoke-WebRequest -Uri $TOR_URL -OutFile $torPath -UseBasicParsing
               $size = (Get-Item $torPath).Length
-              if ($size -gt 1MB) { break }
+              if ($size -gt 1MB) {
+                Write-Host "Downloaded $size bytes on attempt $attempts"
+                $downloaded = $true
+              } else {
                 Write-Host "Download too small ($size bytes), retrying..."
-              Remove-Item $torPath -ErrorAction SilentlyContinue
+              }
             } catch {
               Write-Host "Download attempt $attempts failed: $_"
-              if ($attempts -ge $maxAttempts) { throw }
               Start-Sleep -Seconds 5
             }
           }
+          if (-not $downloaded) { throw "Tor bundle download failed after $maxAttempts attempts" }
           New-Item -ItemType Directory -Path tor-extract -Force
           tar -xzf tor-bundle.tar.gz -C tor-extract
           New-Item -ItemType Directory -Path tor-files -Force
@@ -410,7 +416,11 @@ jobs:
       - name: Bundle Tor for daemon
         # Resilient download: archive.torproject.org occasionally times out
         # from CI egress (observed 2026-07-03: macOS job exit code 6 after
-        # exactly 30s of curl hang). Retries cover transient connection drops.
+        # exactly 30s of curl hang). Retries cover transient connection drops;
+        # size check rejects 0-byte "200 OK" responses from broken mirrors.
+        # NOTE: Invoke-WebRequest on PowerShell 5.1 (default on Windows-latest
+        # runners) does NOT accept -ConnectionTimeout/-OperationTimeout — those
+        # are PowerShell 7+. We rely on the retry loop + size check only.
         shell: powershell
         run: |
           $TOR_VERSION = "15.0.9"
@@ -418,21 +428,25 @@ jobs:
           $torPath = "tor-bundle.tar.gz"
           $attempts = 0
           $maxAttempts = 3
-          while ($attempts -lt $maxAttempts) {
+          $downloaded = $false
+          while ($attempts -lt $maxAttempts -and -not $downloaded) {
             $attempts++
             try {
-              Invoke-WebRequest -Uri $TOR_URL -OutFile $torPath -UseBasicParsing `
-                -ConnectionTimeout 15 -OperationTimeout 120
+              if (Test-Path $torPath) { Remove-Item $torPath -ErrorAction SilentlyContinue }
+              Invoke-WebRequest -Uri $TOR_URL -OutFile $torPath -UseBasicParsing
               $size = (Get-Item $torPath).Length
-              if ($size -gt 1MB) { break }
+              if ($size -gt 1MB) {
+                Write-Host "Downloaded $size bytes on attempt $attempts"
+                $downloaded = $true
+              } else {
                 Write-Host "Download too small ($size bytes), retrying..."
-              Remove-Item $torPath -ErrorAction SilentlyContinue
+              }
             } catch {
               Write-Host "Download attempt $attempts failed: $_"
-              if ($attempts -ge $maxAttempts) { throw }
               Start-Sleep -Seconds 5
             }
           }
+          if (-not $downloaded) { throw "Tor bundle download failed after $maxAttempts attempts" }
           New-Item -ItemType Directory -Path tor-extract -Force
           tar -xzf tor-bundle.tar.gz -C tor-extract
           Copy-Item -Recurse tor-extract/tor/* daemon-dist/tor/