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/start_desktop.ps1

@@ -8,7 +8,6 @@
 
 $ErrorActionPreference = "Stop"
 $repoRoot = Split-Path -Parent (Split-Path -Parent (Split-Path -Parent $PSScriptRoot))
-$repoParent = Split-Path -Parent $repoRoot
 $desktopDir = Join-Path $repoRoot "desktop"
 $runDir = Join-Path $PSScriptRoot ".run"
 New-Item -ItemType Directory -Force -Path $runDir | Out-Null
@@ -22,7 +21,7 @@ if (-not (Test-Path $desktopDir)) {
 }
 
 Set-Location $desktopDir
-$env:PYTHONPATH = $repoParent
+$env:PYTHONPATH = $repoRoot
 $env:PYTHONSAFEPATH = "1"
 $env:AIA_WORKSPACE_ROOT = $repoRoot
 $env:OPS_WORKSPACE_ROOT = $repoRoot