fix: force-pull images on install and fix provisioning test assertions

Installers now use `--pull always --force-recreate` on `docker compose up`
to ensure fresh images are used on every install/reinstall, preventing
stale containers from missing schema changes like db_password.

Fix VendorTenantServiceTest to expect two repository saves in provisioning
tests (one for dbPassword, one for final status).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

installer/install.ps1

@@ -1119,7 +1119,7 @@ function Invoke-ComposeUp {
     $c = $script:cfg
     Log-Info 'Starting Cameleer platform...'
     Push-Location $c.InstallDir
-    try { docker compose -p $c.ComposeProject up -d }
+    try { docker compose -p $c.ComposeProject up -d --pull always --force-recreate }
     finally { Pop-Location }
     Log-Info 'Containers started -- verifying health next.'
 }