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/agents/network_ops_agent.py

@@ -2,10 +2,10 @@ from __future__ import annotations
 
 from typing import Any
 
-from oclaw.runtime.chat.agent import Agent
-from oclaw.runtime.agent_context import build_role_system_context
-from oclaw.platform.persistence.sqlite_store import SqliteStore
-from oclaw.runtime.tools import default_registry
+from runtime.chat.agent import Agent
+from runtime.agent_context import build_role_system_context
+from svc.persistence.sqlite_store import SqliteStore
+from runtime.tools import default_registry
 
 # Ops 专家走与 specialists 相同的工作区框架：runtime/workspaces/ops/{SOUL,ROLE_SYSTEM}.md
 NETWORK_SYSTEM_PROMPT_ZH = build_role_system_context("ops")