chore: upgrade all @objectstack/* packages from 2.0.4 to 2.0.6

- Root: @objectstack/spec, runtime, objectql, driver-memory, plugin-hono-server → 2.0.6
- Root: @objectstack/plugin-auth → 2.0.6 (was 2.0.3)
- Root: @objectstack/cli → ^2.0.6
- All 14 workspace packages: spec → 2.0.6, runtime → ^2.0.6
- Examples: crm, todo → 2.0.6
- apps/web: @objectstack/client → 2.0.6
- Fix metrics test mock: add replaceService method (new in PluginContext 2.0.6)
- Update audit-spec-compliance.mjs version checks to 2.0.6
- Update docs/SPEC_COMPLIANCE_DESIGN.md version reference

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

docs/SPEC_COMPLIANCE_DESIGN.md

@@ -2,7 +2,7 @@
 
 > **Date:** 2026-02-10
 > **Version:** 1.0.0
-> **Based on:** `@objectstack/spec@2.0.4` protocol analysis + ObjectOS codebase scan
+> **Based on:** `@objectstack/spec@2.0.6` protocol analysis + ObjectOS codebase scan
 > **Scope:** Full gap analysis, improvement plan, and upstream spec recommendations
 
 ---

packages/metrics/test/plugin.test.ts

@@ -48,6 +48,9 @@ function createMockContext(): PluginContext {
             debug: jest.fn(),
         },
         getKernel: jest.fn(),
+        replaceService: jest.fn((name: string, service: any) => {
+            services.set(name, service);
+        }),
     };
 }