Function normalize_forge_output 

pub fn normalize_forge_output(forge_output: Value) -> Value

Normalize forge build --json --ast output into the canonical shape.

Forge wraps data in arrays with metadata:

• sources[path] = [{ source_file: { id, ast }, build_id, profile, version }]
• contracts[path][name] = [{ contract: { abi, evm, ... }, build_id, profile, version }]
• build_infos = [{ source_id_to_path: { ... } }]

This unwraps to the canonical flat shape:

• sources[path] = { id, ast }
• contracts[path][name] = { abi, evm, ... }
• source_id_to_path = { ... }