fix: remediate scan-4 findings F058, F062, F063, F071, F072, F073, F074, F075

F058 (critical): Replace while(true) infinite-loop task polling with
TaskService.WaitForTask in 5 container snapshot and storage cmdlets.

F073+F047 (high): Migrate net9.0 → net10.0 across both source .csproj
files, build.yml, publish.yml, and test helper.

F071 (medium): Add Uri.EscapeDataString() to all inline URL path
segments in ~16 cmdlets that bypass service classes (D003).

F062+F063 (medium): Add ConfirmImpact.High to Restart-PveContainer
and Suspend-PveContainer (D006).

F075 (medium): Generate markdown help docs for 89 cmdlets that were
missing documentation (170 total, up from 81).

F072 (low): Remove unused System.Text.Json dependency from Core.csproj.
F074 (low): Raise publish smoke-test threshold from 60 to 150.
F065 (low): Add .github/ISSUE_TEMPLATE/config.yml.
F066 (low): Add CODEOWNERS.

Also fix _TestHelper.ps1 net9.0 → net10.0 framework reference.

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

tests/PSProxmoxVE.Tests/_TestHelper.ps1

@@ -30,10 +30,10 @@ $repoRoot = Resolve-Path (Join-Path $PSScriptRoot '../..')
 $moduleRoot = Join-Path $repoRoot 'src/PSProxmoxVE'
 
 if ($PSVersionTable.PSEdition -eq 'Core') {
-    $frameworks = @('netstandard2.0', 'net9.0', 'net48')
+    $frameworks = @('netstandard2.0', 'net10.0', 'net48')
 }
 else {
-    $frameworks = @('net48', 'netstandard2.0', 'net9.0')
+    $frameworks = @('net48', 'netstandard2.0', 'net10.0')
 }
 
 $searchPaths = foreach ($fw in $frameworks) {