ifc-validate 0.2.0

Schema conformance: WHERE rules, cardinality, GUID and reference integrity.
Documentation
# ifc-validate type_check plan

Status: planned under `VAL-TYPE`. Last updated: 2026-08-19.
Follow `AGENTS.md`; claim one task and record blockers/decisions beneath it.

## Work queue

- [ ] `VTYPE-ENTITY` - entity/subtype references
  - Proof: unit/property/adversarial tests plus crate clippy.
- [ ] `VTYPE-SELECT` - select membership
  - Proof: unit/property/adversarial tests plus crate clippy.
- [ ] `VTYPE-DEF` - defined type chains
  - Proof: unit/property/adversarial tests plus crate clippy.
- [ ] `VTYPE-ENUM` - enum/logical forms
  - Proof: unit/property/adversarial tests plus crate clippy.
- [ ] `VTYPE-SCALAR` - integer/real/string/binary forms
  - Proof: unit/property/adversarial tests plus crate clippy.

## Completion log

Append `TASK-ID - proof - material decision`; no long logs.