v0.3.0

Highlights

• Added fast file-level ownership clusters from path proximity, graph edges, churn, and git co-touches.
• Exposed clustering through rag-rat clusters and MCP repo_clusters.
• Added schema migration/index support for file-level graph lookup.

Verification

• cargo test

Published to crates.io: rag-rat-core, rag-rat-mcp, and rag-rat v0.3.0.