- oakrender: new ticket family (render_frame/render_audio with finished
callback, result frame/samples access, cancel/wait), project copier
C API, cache get_invalidated_ranges, manager set_aggressive_gc
- oaknode: node_copy_inputs, set_value_hint_track, viewer params
setters, video frame cache borrowed outlet, project copy_settings
- oakcodec: encoder desired pixel format, export format extension,
encoding generate_matrix, custom range in encoding params POD
- oaktask: RenderTask orchestrates oakrender tickets (no Qt threads/
watchers), PreCacheTask and ExportTask rewritten over the oaknode/
oakrender/oakcodec C ABIs; frames cross from oakrender to oakcodec
handles by pixel copy (different control blocks)
- the two-step texture/download render path collapses into single-step
(tickets always yield frames); subtitle sidecar kept
- tests: 105 in build-oaktask (export/precache factory paths,
construction, conform end-to-end); regressions all green
