rust/src/bin/ingest.rs:
- Parses $\LaTeX$ equations from .md files (block 602556 and inline $)
- Classifies as spectral/braid/cartan/unknown via keyword detection
- Density check: pauses at >20 equations or >5 unknowns
- Computes spectral fingerprint (σ, τ, ∆, λ_min, λ_max) via character transform
- Emits receipt.json with full results
- Writes .decision.md for user review when too dense
Rust CLI, zero-float spectral computation, serde JSON output.
Cargo.toml: added regex + serde dependencies.
