v0.1.0

Release v0.1.0

First nudgebee fork release published to ghcr.io/nudgebee/node-agent.

Highlights:
- CI/CD: migrated image publish from ECR to GHCR; main is the single
  release branch; v* tags on main trigger multi-arch (amd64+arm64)
  builds and GitHub releases.
- LLM observability pipeline refactor (#234).