Backport(v6): msi: use CloudFlare R2 first

[kenhys]

backport #948, #962

[Watson1978]

Looks for me that this PR does not have the changes in #962

[kenhys]

@Watson1978

Thanks, picked it and applied.

Now synced.

In LTS branch, it is appropriate to refer lts/6/windows/ for example.

 diff -u ../f-p-b.master/fluent-package/msi/pkgsize-test.ps1 fluent-package/msi/pkgsize-test.ps1
--- ../f-p-b.master/fluent-package/msi/pkgsize-test.ps1 2026-02-16 16:27:32.116720286 +0900
+++ fluent-package/msi/pkgsize-test.ps1 2026-02-16 16:26:03.769583640 +0900
@@ -9,19 +9,19 @@
 try {
     "Previous version from git: {0}" -F $previous_version | Write-Host
     $previous_msi_name = "fluent-package-${previous_version}-x64.msi"
-    $response = Invoke-WebRequest -UseBasicParsing -Uri "${base_uri}/${major_version}/windows/${previous_msi_name}" -OutFile $previous_msi_name -PassThru
+    $response = Invoke-WebRequest -UseBasicParsing -Uri "${base_uri}/lts/${major_version}/windows/${previous_msi_name}" -OutFile $previous_msi_name -PassThru
 }
 catch {
     $heroku_uri = 'https://td-agent-package-browser.herokuapp.com'
     Write-Host "An exception was caught: $($_.Exception.Message). Try to find previous version in ${heroku_uri} instead"
     "Checking package major version: {0}" -F $major_version | Write-Host
     "Checking {0}/{1}/windows" -F $heroku_uri, $major_version | Write-Host
-    $msi_links = (Invoke-WebRequest -UseBasicParsing -Uri "${heroku_uri}/${major_version}/windows").Links.href | Where-Object {$_ -like "*.msi"}
+    $msi_links = (Invoke-WebRequest -UseBasicParsing -Uri "${heroku_uri}/lts/${major_version}/windows").Links.href | Where-Object {$_ -like "*.msi"}
     $msi_versions = $($msi_links | Select-String '(\d+\.\d+\.\d+)' | ForEach-Object { $_.Matches[0].Groups[1].Value }) | Sort-Object {[version] $_}
     $previous_version = $msi_versions | Select-Object -Last 1
     "Previous version from {0}: {1}" -F ${heroku_uri}, $previous_version | Write-Host
     $previous_msi_name = "fluent-package-${previous_version}-x64.msi"
-    $response = Invoke-WebRequest -UseBasicParsing -Uri "${base_uri}/${major_version}/windows/${previous_msi_name}" -OutFile $previous_msi_name -PassThru
+    $response = Invoke-WebRequest -UseBasicParsing -Uri "${base_uri}/lts/${major_version}/windows/${previous_msi_name}" -OutFile $previous_msi_name -PassThru
 }
 
 $msi = (Get-Item "fluent-package\\msi\\repositories\\fluent-package-*.msi") | Sort-Object -Descending { $_.LastWriteTime } | Select-Object -First 1

[Watson1978]

👍🏻