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/cli_commands.py

@@ -48,6 +48,24 @@ class DiscoveryCLIResult(CLIResult):
     discovered_assets: int = 0
 
 
+@dataclass
+class AssetAddResult(CLIResult):
+    """Result of asset addition."""
+    asset_hash: Optional[str] = None
+
+
+@dataclass
+class AssetListResult(CLIResult):
+    """Result of asset listing."""
+    assets: Optional[List[Dict[str, Any]]] = None
+
+
+@dataclass
+class AssetInfoResult(CLIResult):
+    """Result of asset info retrieval."""
+    asset_info: Optional[Dict[str, Any]] = None
+
+
 class AssetCommands:
     """CLI commands for asset management."""
 
@@ -112,7 +130,7 @@ class AssetCommands:
         """Get asset library statistics."""
         try:
             # Get basic statistics
-            all_assets = self.asset_manager.registry.list_assets()
+            all_assets = self.asset_manager.registry.list_assets_as_objects()
             total_assets = len(all_assets)
             total_size = sum(asset.size_bytes for asset in all_assets)
 
@@ -234,7 +252,7 @@ class AssetCommands:
             self.optimizer.profile = opt_profile
 
             # Get assets to optimize
-            all_assets = self.asset_manager.registry.list_assets()
+            all_assets = self.asset_manager.registry.list_assets_as_objects()
 
             # Filter by patterns if provided
             assets_to_optimize = []
@@ -286,7 +304,7 @@ class AssetCommands:
         try:
             # Generate usage report
             usage_report = self.analytics.generate_usage_report(include_unused=True)
-            unused_assets = usage_report.unused_assets
+            unused_assets = usage_report.unused_assets_list
 
             # Filter by minimum size
             if min_size_bytes > 0:
@@ -349,4 +367,66 @@ class AssetCommands:
             def finish(self):
                 print("Processing complete!")
 
-        return CLIProgressReporter()
+        return CLIProgressReporter()
+
+    def add_asset(self, file_path: str) -> AssetAddResult:
+        """Add a single asset via CLI."""
+        try:
+            asset_path = Path(file_path)
+            if not asset_path.exists():
+                return AssetAddResult(
+                    success=False,
+                    message=f"File does not exist: {file_path}"
+                )
+
+            # Add asset using asset manager
+            result = self.asset_manager.add_asset(asset_path)
+
+            if result and 'content_hash' in result:
+                return AssetAddResult(
+                    success=True,
+                    message=f"Asset added successfully: {asset_path.name}",
+                    asset_hash=result['content_hash']
+                )
+            else:
+                return AssetAddResult(
+                    success=False,
+                    message=f"Failed to add asset: {file_path}"
+                )
+
+        except Exception as e:
+            return AssetAddResult(
+                success=False,
+                message=f"Failed to add asset: {str(e)}"
+            )
+
+    def list_assets(self) -> AssetListResult:
+        """List all assets via CLI."""
+        try:
+            assets = self.asset_manager.registry.list_assets()
+            return AssetListResult(
+                success=True,
+                message=f"Found {len(assets)} assets",
+                assets=assets
+            )
+        except Exception as e:
+            return AssetListResult(
+                success=False,
+                message=f"Failed to list assets: {str(e)}",
+                assets=[]
+            )
+
+    def get_asset_info(self, content_hash: str) -> AssetInfoResult:
+        """Get information about a specific asset."""
+        try:
+            asset_info = self.asset_manager.registry.get_asset(content_hash)
+            return AssetInfoResult(
+                success=True,
+                message=f"Asset info retrieved for {content_hash[:8]}...",
+                asset_info=asset_info
+            )
+        except Exception as e:
+            return AssetInfoResult(
+                success=False,
+                message=f"Failed to get asset info: {str(e)}"
+            )