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>

tests/test_skills_market_providers.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from oclaw.runtime import skills_market
+from runtime import skills_market
 
 
 def test_get_market_adapter_clawhub_default() -> None:
@@ -28,7 +28,7 @@ def test_cocoloop_resolve_archive_url(monkeypatch) -> None:
             "versions": [{"version": "1.0.0", "archiveUrl": "https://dl.example/bss/skills/demo.zip"}],
         }
 
-    monkeypatch.setattr("oclaw.runtime.skills_market.cocoloop_get_skill_detail", _fake_detail)
+    monkeypatch.setattr("runtime.skills_market.cocoloop_get_skill_detail", _fake_detail)
     a = skills_market.CocoloopMarketAdapter()
     url, ver = a.resolve_archive_url(slug="demo", version=None)
     assert url.endswith("demo.zip")