holocron 0.5.0

Declarative schema & query compiler — one YAML as the source of truth for SQL schema and a type-checked query catalog.
Documentation 
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# Should fail: two tables declared with the same name.
# Caught by L2 (catalog build) — exit 1.
#
# Run: cargo run -- samples/error_duplicate_relation.holocron.yaml

tables:
  - name: tasks
    columns:
      task_id: { type: uuid }
    primary_key: { columns: [task_id] }

  - name: tasks                   # collision: `tasks` already declared above
    columns:
      id: { type: uuid }
    primary_key: { columns: [id] }