Hybrid backend default for high-stakes profiles, provider adapters
for Bedrock/Gemini/Cohere, doctor CLI, ONNX INT8/FP16 quantization,
RAGTruth+FreshQA benchmarks, strict mypy, 3 tutorial notebooks.

1836 tests pass, 0 failures.

Co-Authored-By: Arcane Sapience <protoscience@anulum.li>