release: v0.1.0-beta final audit, cleanup, and hardening

[sainathsapa]

Summary

Final pre-release hardening pass for KeyNetra v0.1.0-beta covering architecture enforcement, runtime
cleanup, tenancy/security checks, observability integration, deployment readiness, and documentation
polish.

Included Changes

• Enforced architecture boundaries with .importlinter contracts and CI coverage.
• Consolidated DB migrations to a baseline initial schema revision.
• Removed dead code and legacy/duplicate infrastructure artifacts.
• Standardized CLI invocation via installed keynetra entrypoint.
• Improved observability:
  • HTTP request and latency metrics
  • DB query latency metrics
  • cache/decision metrics
  • tenant-aware labels and dashboard coverage
• Added/updated monitoring assets:
  • Prometheus scrape config
  • Grafana provisioning + deep dashboard
  • Loki and node-exporter in compose stack
• Updated Docker runtime defaults (Python 3.11, port 8080).
• Added/updated release docs:
  • README
  • ARCHITECTURE
  • DEPLOYMENT
  • SDK guide
  • CODE_OF_CONDUCT
• Release workflow includes Docker publish support for Docker Hub + GHCR.

Validation

• ruff check . ✅
• black --check . ✅
• pytest ✅ (132 passed, 1 skipped)
• lint-imports --config .importlinter ✅
• keynetra --help ✅
• keynetra check-openapi ✅
• docker build -t keynetra:test . ✅
• container endpoint checks (/health/ready, /docs, /metrics) ✅
• docker compose up stack health ✅

[keynetra-admin]

Approved