v4.0.0

• 0c7e67f chore: Release v4.0.0
• 01aea2f docs: Update README.md
• dd386d0 chore: Add a log statement when prometheus is enabled, update .gitignore and include a sample secrets.json file
• 0924fa8 fix: Secrets passed through json/kwargs should override conflicting env vars
• cac7f5d perf: Replace all hard-coded prometheus metric keys with a fetcher
• 5850cbe refactor: Filter docker health check logs in uvicorn
• 45f92f5 fix: Restore prometheus.yml file to avoid connectivity issues with grafana
• 6cdab9b refactor: Remove yaml and yq dependency to improve stability
• e04f1c4 fix: Avoid missing metrics through UI when prometheus in not enabled
• 9a07144 perf: Remove prometheus.yml file usage and improve stability for container launches
• 1a7e904 perf: Stream metrics to endpoint only when prometheus is enabled
• 3569204 build: Add a launch script along with samples for grafana dashboard with prometheus data source
• 9925f38 chore: Update gitignore and remove legacy compose files
• 8a2cd41 perf: Add docker compose files for grafana and prometheus
• 3a5c630 feat: Make /metrics endpoint secure through HTTPBasicCredentials
• 33aba57 feat: Add a new /metrics endpoint to support prometheus plugin for grafana dashboard
• 58f65d8 chore: Update release notes for v3.2.2