fix: double-default display in project list + stale test updates

Use config.default_project as single source of truth for the Default
column in `bm project list`, removing checks against local DB and cloud
API is_default fields that could independently mark multiple projects.

Also updates tests that were out of date after get_project_mode changed
to default unknown projects to CLOUD:
- test_get_client_local_project_uses_asgi_transport: register "main" as LOCAL
- test_run_filters_cloud_projects_each_cycle: register local project in config
- test_new_project_addition_scenario: register projects as LOCAL in config
- test_get_project_mode_defaults_to_cloud: assert new CLOUD default

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: phernandez <paul@basicmachines.co>

src/basic_memory/mcp/project_context.py

@@ -445,6 +445,7 @@ async def get_project_client(
 
     # Step 3: Determine if cloud routing is needed
     config = ConfigManager().config
+    project_entry = config.projects.get(resolved_project)
     project_mode = config.get_project_mode(resolved_project)
 
     # Trigger: workspace provided for a local project (without explicit --cloud)
@@ -459,7 +460,6 @@ async def get_project_client(
     if project_mode == ProjectMode.CLOUD or (_explicit_routing() and not _force_local_mode()):
         # --- Cloud routing: resolve workspace with priority chain ---
         effective_workspace = workspace
-        project_entry = config.projects.get(resolved_project)
 
         # Priority 2: per-project workspace_id from config
         if effective_workspace is None and project_entry and project_entry.workspace_id: