quiverdb-cli 0.28.0

Quiver command-line interface and single-binary entrypoint.
quiverdb-cli-0.28.0 is not a library.

Quiver — single-binary entrypoint.

Subcommands wire together the server, terminal cockpit, MCP server, admin tools, and benchmarks. serve is live; the others land with their Phase 1 features.