Module node 

Graph node types for the dependency graph.

This module defines the heterogeneous node types used in the CodeGraph:

• FileNode: Represents a source file
• SymbolNode: Represents an extracted symbol (function, class, etc.)

Nodes are stored in a unified NodeData enum for use with petgraph.

Structs

DataGraphNode

Represents a data-bearing node in the data/flow subgraph.

ExternalNode

Represents an external dependency (not in the project).

FileNode

Represents a source file in the dependency graph.

SymbolNode

Represents an extracted symbol in the dependency graph.

Enums

DependencySource

Where the dependency information came from.

ExternalClassification

Classification of an external dependency.

NodeData

Unified node data enum for the dependency graph.