Add verified JFK transcript + diff results

Q4_K v2: F16 encoder + Q4_K LLM (selective quantization)

Add reference activation dump (jfk.wav, bf16 forward)

Add Q4_K GGUF (PLAN #58)

Add README with architecture details and quick start

Add F16 GGUF (PLAN #58 MOSS-Audio-4B-Instruct, 901 tensors)

initial commit