feat(dashboard+api): card-based dashboard, camelCase API, UTC fixes

Dashboard: new Syncfusion card layout, global stats, filters, health bars, active event display, client details, bulk restart, 15s auto-refresh, manual refresh toasts
API: standardized responses to camelCase; added serializers.py and updated events endpoints
Time: ensured UTC storage; frontend appends 'Z' for parsing and displays local time
Docs: updated copilot-instructions.md, README.md, TECH-CHANGELOG.md
Program Info: bumped to 2025.1.0-alpha.12 with user-facing changelog
BREAKING: external API consumers must migrate field names from PascalCase to camelCase.

exclude.txt

@@ -0,0 +1,80 @@
+# OS/Editor
+.DS_Store
+Thumbs.db
+desktop.ini
+.vscode/
+.idea/
+*.swp
+*.swo
+*.bak
+*.tmp
+
+# Python
+__pycache__/
+*.py[cod]
+*.pyc
+*.pyo
+*.pyd
+*.pdb
+*.egg-info/
+*.eggs/
+.pytest_cache/
+*.mypy_cache/
+*.hypothesis/
+*.coverage
+.coverage.*
+*.cache
+instance/
+
+# Virtual environments
+venv/
+env/
+.venv/
+.env/
+
+# Environment files
+# .env
+# .env.local
+
+# Logs and databases
+*.log
+*.log.1
+*.sqlite3
+*.db
+
+# Node.js
+node_modules/
+dashboard/node_modules/
+dashboard/.vite/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-store/
+
+# Docker
+*.pid
+*.tar
+docker-compose.override.yml
+docker-compose.override.*.yml
+docker-compose.override.*.yaml
+
+# Devcontainer
+.devcontainer/
+
+# Project-specific
+received_screenshots/
+screenshots/
+media/
+mosquitto/
+certs/
+alte/
+sync.ffs_db
+dashboard/manitine_test.py
+dashboard/pages/test.py
+dashboard/sidebar_test.py
+dashboard/assets/responsive-sidebar.css
+dashboard/src/nested_tabs.js
+
+# Git
+.git/
+.gitignore