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>

interfaces/gateway/server_plugins.py

@@ -4,7 +4,7 @@ from dataclasses import dataclass
 from pathlib import Path
 from typing import Any, Callable
 
-from oclaw.platform.config.runtime_paths import runtime_extensions_root
+from svc.config.runtime_paths import runtime_extensions_root
 from .python_extensions_loader import build_python_extensions_registry
 
 GatewayHandler = Callable[..., Any]