remove: Django Debug Toolbar from development setup

Removed django-debug-toolbar as it's unnecessary for API-only setup:
- Removed from INSTALLED_APPS and MIDDLEWARE in local.py
- Removed from dev dependencies in pyproject.toml
- Updated uv.lock after package removal

The debug toolbar was interfering with API documentation pages
and provides minimal value for a primarily API-based application.

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

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

smoothschedule/pyproject.toml

@@ -133,7 +133,6 @@ force-single-line = true
 dev = [
     "coverage==7.12.0",
     "django-coverage-plugin==3.2.0",
-    "django-debug-toolbar==6.1.0",
     "django-extensions==4.1",
     "django-stubs[compatible-mypy]==5.2.7",
     "djangorestframework-stubs==3.16.5",