[Backend Release] v0.43.0

[deploystack-automation]

Backend Release v0.43.0

This PR prepares a new backend release.

When merged, this will:

1. Create a release tag
2. Build and publish a multi-architecture Docker image to Docker Hub

The Docker image will be available at:

• deploystack/backend:latest
• deploystack/backend:v0.43.0

Supported Architectures

• linux/amd64 (Intel/AMD)
• linux/arm64 (Apple Silicon, AWS Graviton)

Release notes:

• feat(all): MCP Tool Metadata Collection & Display (8af4610)
• chore(all): update dependencies in backend, frontend, and satellite services (94a274f)

[deploystack-automation]

Release Branch Cleanup ✅

Branch backend-release has been automatically deleted after PR was merged.