Fix remaining old terminology references

- backend/app/main.py: grove/ -> project/ in SPA route check
- frontend/vite.config.ts: /grove -> /project proxy
- helm/orchard/templates/NOTES.txt: Updated API examples
- migrations/001_initial.sql: Updated table/column names

frontend/vite.config.ts

@@ -7,7 +7,7 @@ export default defineConfig({
     proxy: {
       '/api': 'http://localhost:8080',
       '/health': 'http://localhost:8080',
-      '/grove': 'http://localhost:8080',
+      '/project': 'http://localhost:8080',
     }
   }
 })