Add comprehensive Pest tests for namespace-level entitlements including:
- canForNamespace() with user-owned and workspace-owned namespaces
- Entitlement cascade (namespace -> workspace -> user tier)
- provisionNamespacePackage() with replacement, expiry, metadata
- provisionNamespaceBoost() with stacking and unlimited overrides
- recordNamespaceUsage() with metadata and workspace context
- getNamespaceUsageSummary() with percentages and near-limit detection
- invalidateNamespaceCache() for limits and usage
- Multiple namespaces with separate usage tracking
- Boost stacking behaviour
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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