feat: add appointments, campaigns, admin, storage, tests and various updates

- Add new routers: admin, appointments, campaigns
- Add storage service and logging config
- Add migrations directory and test suite with pytest config
- Add supabase_migration_features.sql
- Update models, dependencies, config, and existing routers
- Remove whatsapp_service (deleted)
- Update pyproject.toml and uv.lock dependencies

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/conftest.py

@@ -0,0 +1,77 @@
+"""
+Test fixtures for Contexta backend.
+Uses unittest.mock to avoid hitting real Supabase/Qdrant in unit tests.
+"""
+import pytest
+from unittest.mock import MagicMock, patch, AsyncMock
+from fastapi.testclient import TestClient
+
+
+@pytest.fixture
+def client():
+    """FastAPI test client. Patches Supabase and Qdrant at module level."""
+    with patch("app.database.get_supabase") as mock_sb, \
+         patch("app.services.vector_store.vector_store") as mock_vs:
+        mock_sb.return_value = _make_supabase_mock()
+        mock_vs.create_collection = MagicMock()
+        mock_vs.delete_collection = MagicMock()
+        mock_vs.search = MagicMock(return_value=[])
+
+        from app.main import app
+        yield TestClient(app)
+
+
+@pytest.fixture
+def supabase_mock():
+    """Standalone Supabase mock for direct use."""
+    return _make_supabase_mock()
+
+
+@pytest.fixture
+def auth_headers():
+    """Mock auth headers (token is verified by patching get_current_user)."""
+    return {"Authorization": "Bearer test-token"}
+
+
+@pytest.fixture
+def mock_current_user():
+    """A mock Supabase auth user object."""
+    user = MagicMock()
+    user.id = "test-user-id"
+    user.email = "test@example.com"
+    return user
+
+
+@pytest.fixture
+def mock_admin_user():
+    """A mock admin auth user object."""
+    user = MagicMock()
+    user.id = "admin-user-id"
+    user.email = "admin@example.com"
+    return user
+
+
+def _make_supabase_mock():
+    """Build a chainable Supabase client mock."""
+    supabase = MagicMock()
+
+    # Default table chain returns empty data
+    table_mock = MagicMock()
+    table_mock.select.return_value = table_mock
+    table_mock.insert.return_value = table_mock
+    table_mock.update.return_value = table_mock
+    table_mock.delete.return_value = table_mock
+    table_mock.upsert.return_value = table_mock
+    table_mock.eq.return_value = table_mock
+    table_mock.in_.return_value = table_mock
+    table_mock.limit.return_value = table_mock
+    table_mock.order.return_value = table_mock
+    table_mock.range.return_value = table_mock
+    table_mock.gte.return_value = table_mock
+    table_mock.lt.return_value = table_mock
+    table_mock.execute.return_value = MagicMock(data=[], count=0)
+
+    supabase.table.return_value = table_mock
+    supabase.auth = MagicMock()
+
+    return supabase