Produce a `.codebase-memory/graph.db.zst` team-shared artifact by force-exporting through codebase-memory-mcp. Use when the user asks to "share the index", "make the team skip reindex", "commit graph.db.zst", "produce the artifact", or when `index_repository` returns `artifact_present=false`. Also use when the artifact is missing or stale, when `incremental.noop` blocks an export, or when MCP-side persistence silently no-ops.
