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/dsml_tool_parse.py

@@ -15,7 +15,7 @@ import re
 import uuid
 from typing import Any
 
-from oclaw.platform.llm.transports.base import LLMToolCall
+from svc.llm.transports.base import LLMToolCall
 
 # Official DeepSeek-V4 DSML token uses FULLWIDTH VERTICAL LINE (U+FF5C).
 _DSML_PIPE = "\uFF5C"