refactor: align backend layout and supabase infra

Consolidate backend modules/tests under the backend package while syncing Supabase compose/env config and related plans.

backend/tests/unit/services/base/test_qdrant_service.py

@@ -0,0 +1,78 @@
+from __future__ import annotations
+
+import pytest
+
+from core.config.settings import QdrantSettings
+from services.base.qdrant import QdrantService
+
+
+class _FakeCollection:
+    def __init__(self, name: str) -> None:
+        self.name = name
+
+
+class _FakeCollections:
+    def __init__(self) -> None:
+        self.collections = [_FakeCollection("default")]
+
+
+class _FakeQdrantClient:
+    def get_collections(self) -> _FakeCollections:
+        return _FakeCollections()
+
+
+@pytest.mark.asyncio
+async def test_initialize_success(monkeypatch: pytest.MonkeyPatch) -> None:
+    service = QdrantService(settings=QdrantSettings(host="localhost", port=6333))
+
+    def _build_client(_: QdrantService) -> _FakeQdrantClient:
+        return _FakeQdrantClient()
+
+    monkeypatch.setattr(QdrantService, "_build_client", _build_client)
+
+    result = await service.initialize()
+
+    assert result is True
+    assert service.is_initialized is True
+
+    health = await service.health_check()
+    assert health["status"] == "healthy"
+
+
+@pytest.mark.asyncio
+async def test_initialize_failure(monkeypatch: pytest.MonkeyPatch) -> None:
+    service = QdrantService(settings=QdrantSettings(host="localhost", port=6333))
+
+    def _build_client(_: QdrantService) -> _FakeQdrantClient:
+        raise RuntimeError("boom")
+
+    monkeypatch.setattr(QdrantService, "_build_client", _build_client)
+
+    result = await service.initialize()
+
+    assert result is False
+    assert service.is_initialized is False
+
+
+@pytest.mark.asyncio
+async def test_health_check_returns_unhealthy_when_not_initialized() -> None:
+    service = QdrantService(settings=QdrantSettings(host="localhost", port=6333))
+
+    health = await service.health_check()
+
+    assert health["status"] == "unhealthy"
+
+
+@pytest.mark.asyncio
+async def test_close_is_idempotent() -> None:
+    service = QdrantService(settings=QdrantSettings(host="localhost", port=6333))
+
+    assert await service.close() is True
+    assert service.is_initialized is False
+
+
+def test_get_client_raises_before_init() -> None:
+    service = QdrantService(settings=QdrantSettings(host="localhost", port=6333))
+
+    with pytest.raises(RuntimeError):
+        service.get_client()