Hierarchy query fixtures declare real node types

QueryAsyncIntegrationTests.QueryAsync_ScopeHierarchy_FindsAgentUnderNodeType creates a Project declaration, an agent beneath it and a ProductLaunch instance whose NodeType points at Project. Project must itself use MeshNode.NodeTypePath and NodeTypeDefinition content. A Markdown node at that address is occupied content, not a registered type.

On 2026-09-22, Plugins CI run 35741723692 rejected the old fixture in 178 ms against core c13f5c2e5bd93a79791a30e46d667b69663e522a. Core's declaration-occupancy guard correctly refused the ProductLaunch write; this was not a query timeout or Codex login failure. The preceding green run used an earlier core revision without that guard.

PR 2274 repairs the fixture declaration. It preserves the actual instance write and all assertions about the declared type and discovered agent. Do not weaken production validation, remove the write or replace the typed declaration with a permission grant to make this query test pass.