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/agent_context/loader.py

@@ -5,7 +5,7 @@ import threading
 from pathlib import Path
 from typing import Any
 
-from oclaw.platform.config.paths import PROJECT_ROOT
+from svc.config.paths import PROJECT_ROOT
 
 _ROLE_CONTEXT_CACHE_LOCK = threading.Lock()
 _ROLE_CONTEXT_CACHE: dict[tuple[str, tuple[Any, ...], tuple[tuple[str, str], ...]], str] = {}