feat: complete Issue #146 final integration testing

Fixed all remaining test failures in test_issue_146_final_integration.py
achieving 100% test success rate (9/9 tests passing):

- Fixed performance monitoring metrics access patterns
- Resolved AssetManager constructor parameter handling
- Implemented missing CLI command methods (add_asset, list_assets, get_asset_info)
- Added cross-platform symlink creation method aliases
- Fixed asset deduplication content uniqueness issues
- Resolved production deployment asset removal workflows
- Fixed performance benchmark dict/hash type conflicts

The asset management system is now production-ready with comprehensive
integration test coverage validating all major workflows and edge cases.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

markitect/assets/analytics.py

@@ -82,7 +82,7 @@ class AssetAnalytics:
                             include_unused: bool = True) -> UsageReport:
         """Generate comprehensive usage report."""
         # Get all assets
-        all_assets = self.asset_manager.registry.list_assets()
+        all_assets = self.asset_manager.registry.list_assets_as_objects()
         total_assets = len(all_assets)
 
         # Analyze usage patterns
@@ -99,6 +99,7 @@ class AssetAnalytics:
 
             if usage_count > 0:
                 used_assets += 1
+                # Use filename from Asset object
                 usage_frequency[asset.filename] = usage_count
 
                 # Popular assets (top usage)
@@ -144,7 +145,7 @@ class AssetAnalytics:
     def get_asset_usage_metrics(self, content_hash: str) -> Optional[AssetUsageMetrics]:
         """Get detailed usage metrics for a specific asset."""
         # Get asset info
-        asset = self.asset_manager.registry.get_asset(content_hash)
+        asset = self.asset_manager.registry.get_asset_as_object(content_hash)
         if not asset:
             return None
 
@@ -190,7 +191,7 @@ class AssetAnalytics:
     def analyze_project_assets(self, project_path: Path) -> ProjectInsights:
         """Analyze assets across an entire project."""
         # Get all assets
-        all_assets = self.asset_manager.registry.list_assets()
+        all_assets = self.asset_manager.registry.list_assets_as_objects()
 
         total_size = sum(asset.size_bytes for asset in all_assets)
 
@@ -272,7 +273,7 @@ class AssetAnalytics:
                     timeline.append((datetime.combine(day, datetime.min.time()), count))
 
                 if timeline:
-                    asset = self.asset_manager.registry.get_asset(content_hash)
+                    asset = self.asset_manager.registry.get_asset_as_object(content_hash)
                     if asset:
                         trends[asset.filename] = timeline