OrionBelt Semantic Layer

Open-source semantic sidecar that compiles YAML-defined dimensions, measures, and metrics into optimized SQL across 8 engines (BigQuery, ClickHouse, Databricks, Dremio, DuckDB, MySQL, PostgreSQL, Snowflake). Unified REST, MCP, and Postgres wire protocol; one model powers AI agents, analytics, DQ rules, and KPIs.