fix: serialize property writes and expose n8n results

- Serialize property set and remove commands per vault note to avoid lost frontmatter writes.
- Wait briefly for successful property writes to hit disk before releasing the note lock.
- Return property path, name, value, type, operation, and ok status in n8n outputs.
- Include property details on continue-on-fail errors so failed items are visible in n8n.
- Bump obsidian-api to 1.0.7 and n8n-nodes-obsidian-cli-api to 0.2.8.
- Add regression coverage for concurrent property writes to the same note.

tests/test_property_commands.py

@@ -1,3 +1,5 @@
+import asyncio
+
 from conftest import client, use_jwt_auth, use_work_vault
 
 def test_property_set_name_is_not_treated_as_path(monkeypatch, tmp_path):
@@ -45,6 +47,33 @@ def test_property_set_datetime_defaults_missing_time(monkeypatch, tmp_path):
   assert response.status_code == 200
   assert response.json()["command"] == ["python", "vault=work", "property:set", "path=00. Journal/New.md", "name=from", "value=2026-06-24T00:00:00", "type=datetime"]
 
+def test_property_writes_to_same_note_are_serialized(monkeypatch, tmp_path):
+  import app.runner as runner
+
+  vault = tmp_path / "vault"
+  vault.mkdir()
+  calls:list[str] = []
+
+  async def fake_run_process(command, cwd, stdin, timeout):
+    calls.append(command[command.index("name=first") if "name=first" in command else command.index("name=second")])
+    if "name=first" in command:
+      await asyncio.sleep(0.01)
+    assert calls == ["name=first"] or calls == ["name=first", "name=second"]
+    (vault / "Daily" / "Note.md").write_text("\n".join(calls), encoding="utf-8")
+    return b"", b"", 0, False
+
+  monkeypatch.setattr(runner, "run_process", fake_run_process)
+
+  async def run_commands():
+    await asyncio.gather(
+      runner.execute_command(["vault=work", "property:set", "path=Daily/Note.md", "name=first", "value=1", "type=text"], vault, None, 60),
+      runner.execute_command(["vault=work", "property:set", "path=Daily/Note.md", "name=second", "value=2", "type=text"], vault, None, 60),
+    )
+
+  asyncio.run(run_commands())
+
+  assert calls == ["name=first", "name=second"]
+
 def test_rename_name_is_treated_as_path(monkeypatch):
   token = use_jwt_auth(monkeypatch, {"sub": "journal", "commands": ["rename"], "vaults": ["*"], "paths": ["00. Journal/"]})