test(dashboard): add deterministicGuardLocks to @fusion/core mocks

proxy-routes and routes-agent-skills tests mock @fusion/core but omit
the deterministicGuardLocks Map that register-task-workflow-routes
imports at module-load time. Add the export so the mock satisfies the
shape consumers expect. Fixes 24 failing tests across the two files.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/dashboard/src/__tests__/proxy-routes.test.ts

@@ -30,6 +30,7 @@ vi.mock("@fusion/core", () => {
       init = mockAgentStoreInit;
       getAgent = mockAgentStoreGetAgent;
     },
+    deterministicGuardLocks: new Map(),
   };
 });
 

packages/dashboard/src/__tests__/routes-agent-skills.test.ts

@@ -57,6 +57,7 @@ vi.mock("@fusion/core", () => {
         ? `.fusion/agents/${agentName.toLowerCase().replace(/[^a-z0-9]+/g, "-").replace(/^-+|-+$/g, "")}-${agentId}/HEARTBEAT.md`
         : `.fusion/agents/${agentId}/HEARTBEAT.md`,
     getSafeAgentAssetIdSegment: (agentId: string) => agentId.toLowerCase().replace(/[^a-z0-9]+/g, "-").replace(/^-+|-+$/g, "") || "agent",
+    deterministicGuardLocks: new Map(),
   };
 });