Module emitter 

Emit classpath nodes and edges into the sqry unified graph.

This module takes a ClasspathIndex (produced by bytecode parsing) and emits synthetic graph nodes and edges into a StagingGraph. Each JAR gets a synthetic FileId via FileRegistry::register_external(), and each class/method/field becomes a graph node with zero-span metadata (since the data comes from bytecode, not source).

Emission pipeline

1. File registration - For each unique JAR path, register a synthetic FileEntry with path convention {jar_path}!/{fqn}.class.
2. Node emission - For each ClassStub, emit nodes for the class itself, its methods, fields, annotations, type parameters, enum constants, lambda targets, and module declarations.
3. Structural edges - Class→Method (Defines), Class→Field (Defines), Class→InnerClass (Contains).
4. Metadata attachment - ClasspathNodeMetadata on all emitted nodes (class, method, field, enum constant, type parameter, lambda target, module).

After emission, the returned FQN→NodeId mapping is used by register_classpath_exports and create_classpath_edges for ExportMap registration and cross-reference edge creation.

Structs

ClasspathNodeRef

Duplicate-aware emitted node reference.

EmissionResult

Result of classpath node emission.

Functions

create_classpath_edges

Create inheritance, generic, annotation, module, and inner-class edges for classpath nodes.

emit_classpath_nodes

Emit all classpath nodes and edges into a staging graph.

emit_into_code_graph

Emit classpath nodes and structural edges directly into a CodeGraph.

register_classpath_exports

Register classpath nodes in the ExportMap for cross-file resolution.