Build the complete artifact pillar with five packages:
- artifacts: Artifact, Snapshot, Citation, Publisher types with Get/Store
DB methods, tag/category management, metadata ops, YAML import
- blob: content-addressable store (SHA256, hierarchical dir layout)
- proto: protobuf definitions (common.proto, artifacts.proto) with buf
linting and code generation
- server: gRPC ArtifactService implementation (create/get artifacts,
store/retrieve blobs, manage tags/categories, search by tag)
All FK insertion ordering is correct (parent rows before children).
Full test coverage across artifacts, blob, and server packages.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
