Add fastvideo/api/resolution.py. resolve_generator_config parses a raw
GeneratorConfig mapping and runs an ordered list of steps over it. Each
step receives a read-only ResolutionView and returns {dotted_path: value};
it never assigns fields. The driver records every decision as
(source, values), where source is the step's qualified name, and the last
decision for a path wins. Explicit paths are taken from the keys of the
raw mapping, so "the user set this" is never inferred from defaults.
The result is a frozen ResolvedGeneratorConfig with the same nesting as
GeneratorConfig, per-path provenance, and with_override(source, values)
as the only way to change it after resolution; every override is logged.
The module is not wired into FastVideoArgs, compat.py, or any entry
point yet, so runtime behavior is unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012M91wnVFmPEvJ9h39r5BH7
