Module graph_builder 

Graph-level operations for quantized ONNX models.

Three responsibilities:

1. QDQ transform — replace FP32 initializers with INT8 + DequantizeLinear
2. Connectivity validation — walk the graph and verify every edge resolves
3. Opset management — ensure the model declares opset ≥ 13

Structs

ConnectivityReport

Result of a graph-connectivity check.

QdqWeightInput

One weight to convert: FP32 initializer → INT8 + DequantizeLinear block.

Functions

apply_qdq_transform

Replace FP32 weight initializers with INT8 quantized equivalents + DequantizeLinear nodes.

ensure_opset_version

Ensure the default ONNX domain opset is at least min_version.

validate_graph_connectivity

Walk the graph and verify every node input resolves to something.