QA: apr run Falsification Suite

Popperian falsification tests for the apr run command with full matrix support (PMAT-QA-RUST-001 + PMAT-QA-MATRIX-001).

Uses the Same-Model Comparison Protocol (PMAT-SHOWCASE-METHODOLOGY-001):

• Class A (Quantized): GGUF Q4_K_M vs APR Q4_K (converted from same GGUF)
• Class B (Full Precision): SafeTensors F32 vs APR F32 (converted from same SafeTensors)

Run

cargo run --example qa_run
cargo run --example qa_run -- --model path/to/model.gguf
cargo run --example qa_run -- --gpu

Source

// Run this example:
//   cargo run --example qa_run
//
// See the CLI reference and source code in crates/ for implementation details.