refactor: root-package imports (svc/runtime/interfaces) and fix PYTHONPATH

- Rename platform/ to svc/ to avoid shadowing stdlib platform.
- Replace from oclaw.* with from svc/runtime/interfaces; update -m CLI paths.
- tests/conftest: prepend repo root to sys.path (no parent-folder package name).
- CI: paths and offline_eval script under repo root.
- Ops scripts: PYTHONPATH must be repo root for python -m runtime.* (fixes gateway/WhatsApp sidecar startup).
- Fix default oclaw.json path in tabular/file attachment limits; stabilize attachment test config.

Co-authored-by: Cursor <cursoragent@cursor.com>

runtime/operations/scripts/stop_ops.ps1

@@ -30,9 +30,8 @@ if (-not $repoRoot) {
     # Fallback: old relative layout assumption
     $repoRoot = Split-Path -Parent (Split-Path -Parent (Split-Path -Parent $PSScriptRoot))
 }
-$repoParent = Split-Path -Parent $repoRoot
 Set-Location $repoRoot
-$env:PYTHONPATH = $repoParent
+$env:PYTHONPATH = $repoRoot
 $env:PYTHONSAFEPATH = "1"
 $env:AIA_WORKSPACE_ROOT = $repoRoot
 $env:OPS_WORKSPACE_ROOT = $repoRoot
@@ -50,7 +49,7 @@ Write-Step "Working directory: $repoRoot"
 Write-Step "Stopping stack services..."
 
 try {
-    & $pythonExe -m oclaw.runtime.operations stack down
+    & $pythonExe -m runtime.operations stack down
     Write-Host "Stack stopped." -ForegroundColor Green
 } catch {
     Write-Host "[WARN] stack down failed: $($_.Exception.Message)" -ForegroundColor Yellow
@@ -61,7 +60,7 @@ try {
 
 Write-Step "Current status"
 try {
-    & $pythonExe -m oclaw.runtime.operations stack status
+    & $pythonExe -m runtime.operations stack status
 } catch {
     Write-Host "[WARN] Unable to read status after stop." -ForegroundColor Yellow
 }