FN-6154: let the mobile node editor fill the screen

Let the mobile workflow node editor inspector use the full available height.

- remove the mobile inspector max-height cap so the editor stage can expand full screen
- update the WorkflowNodeEditor mobile CSS contract test to assert the new max-height rule
- quarantine the unrelated flaky dashboard Board test and record it in the quarantine ledger

Files changed:
 packages/dashboard/app/components/WorkflowNodeEditor.css          | 1 +
 .../app/components/__tests__/WorkflowNodeEditor.css.test.ts       | 1 +
 packages/dashboard/vitest.config.ts                               | 2 +-
 scripts/lib/test-quarantine.json                                  | 8 +++++++-
 4 files changed, 10 insertions(+), 2 deletions(-)

Fusion-Task-Id: FN-6154

Fusion-Task-Lineage: 14928ad1-dc84-461b-9adf-b5ee079e3b0d

packages/dashboard/app/components/WorkflowNodeEditor.css

@@ -1398,6 +1398,7 @@
   .wf-editor-body--editor-stage .wf-editor-inspector {
     width: 100%;
     min-width: 0;
+    max-height: none;
     flex: 1 1 auto;
     min-height: 0;
     border-left: none;