fix: address PR #589 review feedback (round 2)

Consolidate three independent RefreshTokenStorage lazy singletons into a
single lock-protected get_shared_storage() function, eliminating race
conditions on concurrent first-access. Remove blanket try/except in
_get_stored_scopes so storage errors propagate as proper MCP errors
instead of silently triggering "please provision" messages. Handle
declined/cancelled elicitation results in Login Flow tools by cleaning up
sessions and returning clear status. Add update_app_password_scopes() to
avoid unnecessary decrypt/re-encrypt when only scopes change. Add
unprovisioned-user early exit and no-op detection to nc_auth_update_scopes.
Remove four dead config fields and misleading NEXTCLOUD_PASSWORD deprecation
warning. Add periodic login flow session cleanup task. Generate separate
Fernet keys per service. Add board cleanup in deck integration test. Gate
CI unit tests on linting and skip Astrolabe build for single-user profile.
Fix test markers from oauth to multi_user_basic for astrolabe integration
tests. Update login_flow.py docstrings to document outbound HTTP calls.

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

tests/server/login_flow/test_login_flow_integration.py

@@ -443,35 +443,59 @@ class TestLoginFlowDeck:
 
     async def test_deck_board_workflow(self, nc_mcp_login_flow_client: ClientSession):
         """Create board → list boards → get board details."""
+        import os
+
+        import httpx
+
         suffix = uuid.uuid4().hex[:8]
         board_title = f"LoginFlow Board {suffix}"
+        board_id = None
 
-        # Create board (requires title and color)
-        create_result = await nc_mcp_login_flow_client.call_tool(
-            "deck_create_board", {"title": board_title, "color": "0076D1"}
-        )
-        assert create_result.isError is False, (
-            f"Create board failed: {create_result.content[0].text}"
-        )
-        board_data = json.loads(create_result.content[0].text)
-        board_id = board_data.get("id") or board_data.get("board_id")
-        logger.info(f"Created board: {board_id}")
+        try:
+            # Create board (requires title and color)
+            create_result = await nc_mcp_login_flow_client.call_tool(
+                "deck_create_board", {"title": board_title, "color": "0076D1"}
+            )
+            assert create_result.isError is False, (
+                f"Create board failed: {create_result.content[0].text}"
+            )
+            board_data = json.loads(create_result.content[0].text)
+            board_id = board_data.get("id") or board_data.get("board_id")
+            logger.info(f"Created board: {board_id}")
 
-        # List boards (tool name is deck_get_boards)
-        list_result = await nc_mcp_login_flow_client.call_tool("deck_get_boards", {})
-        assert list_result.isError is False
-        boards_data = json.loads(list_result.content[0].text)
-        boards = boards_data.get("boards", [])
-        board_ids = [b.get("id") for b in boards]
-        assert board_id in board_ids
+            # List boards (tool name is deck_get_boards)
+            list_result = await nc_mcp_login_flow_client.call_tool(
+                "deck_get_boards", {}
+            )
+            assert list_result.isError is False
+            boards_data = json.loads(list_result.content[0].text)
+            boards = boards_data.get("boards", [])
+            board_ids = [b.get("id") for b in boards]
+            assert board_id in board_ids
 
-        # Get board details
-        detail_result = await nc_mcp_login_flow_client.call_tool(
-            "deck_get_board", {"board_id": board_id}
-        )
-        assert detail_result.isError is False
-
-        # Note: no deck_delete_board tool exists, board cleanup is manual
+            # Get board details
+            detail_result = await nc_mcp_login_flow_client.call_tool(
+                "deck_get_board", {"board_id": board_id}
+            )
+            assert detail_result.isError is False
+        finally:
+            # Clean up board via Deck REST API (no MCP delete_board tool exists)
+            if board_id is not None:
+                nc_host = os.getenv("NEXTCLOUD_HOST", "http://localhost:8080")
+                nc_user = os.getenv("NEXTCLOUD_USERNAME", "admin")
+                nc_pass = os.getenv("NEXTCLOUD_PASSWORD", "admin")
+                try:
+                    async with httpx.AsyncClient(
+                        base_url=nc_host,
+                        auth=httpx.BasicAuth(nc_user, nc_pass),
+                        headers={"OCS-APIREQUEST": "true"},
+                    ) as client:
+                        resp = await client.delete(
+                            f"/apps/deck/api/v1.0/boards/{board_id}"
+                        )
+                        logger.info(f"Board cleanup: {board_id} → {resp.status_code}")
+                except Exception as e:
+                    logger.warning(f"Board cleanup failed: {e}")
 
 
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