Clean up Helm directory and update documentation

- Removed deprecated chart files from helm/ root directory
- Updated all Helm documentation to reference warehouse13 chart
- Changed database name from 'datalake' to 'warehouse13' in values.yaml
- Updated helm command examples in SUMMARY.md
- Fixed migration instructions in helm/README.md
- Updated PostgreSQL backup/restore commands with correct database name

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

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

helm/README.md

@@ -20,23 +20,19 @@ helm install warehouse13 ./warehouse13
 
 **Documentation:** See [warehouse13/README.md](./warehouse13/README.md)
 
-## Legacy Chart (Deprecated)
+## Migration from Legacy Chart
 
-The files in this root `helm/` directory are from an older version and are marked as deprecated. Please use the `./warehouse13/` chart instead.
-
-## Migration
-
-If you're using the old chart, migration is straightforward:
+If you were using an older version of the chart, migration is straightforward:
 
 ```bash
-# Uninstall old chart
-helm uninstall datalake
+# Uninstall old chart (if named "datalake" or other name)
+helm uninstall <old-release-name>
 
 # Install new chart
-helm install warehouse13 ./warehouse13
+helm install warehouse13 ./warehouse13 --namespace warehouse13 --create-namespace
 
 # Or upgrade in place (if compatible)
-helm upgrade datalake ./warehouse13
+helm upgrade <old-release-name> ./warehouse13
 ```
 
 Note: Check your values.yaml configuration and update image repositories, resource limits, and other settings as needed.