Block a user
Implement stack run: execute any pipeline by name with target selection
Build unified staging pipeline: raw files to DuckDB to Iceberg
Implement stack load cclf: CCLF file ingestion into DuckDB
Implement stack load seed: load seed/reference data into DuckDB
Implement stack load bcda: BCDA FHIR export ingestion into DuckDB
Build CLI skeleton with typer: stack run/load/generate/bib/lake/db/validate/docs
Add [api] section to stack.toml with host, port, secret, workers
Add FastAPI app with auth (JWT) and pipeline/bib/status endpoints
Wire stack.toml into all modules replacing hardcoded paths