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_mcp_runtime.py

@@ -7,7 +7,7 @@ import unittest
 from pathlib import Path
 from unittest.mock import patch
 
-from oclaw.runtime.tools.mcp.runtime import McpProcessRuntime
+from runtime.tools.mcp.runtime import McpProcessRuntime
 
 
 class McpRuntimeTests(unittest.TestCase):
@@ -71,7 +71,7 @@ class McpRuntimeTests(unittest.TestCase):
         finally:
             rt.stop()
 
-    @patch("oclaw.runtime.operations.mcp_env.mcp_local_env_merged", return_value={"MCP_ONLY_FROM_FILE": "fileval"})
+    @patch("runtime.operations.mcp_env.mcp_local_env_merged", return_value={"MCP_ONLY_FROM_FILE": "fileval"})
     def test_mcp_local_env_keys_passed_without_allowlist_name(self, _mock_merged: object) -> None:
         os.environ["MCP_ONLY_FROM_FILE"] = "liveval"
         try: