CLAUDE: Step 2 corr — split TpProc into granular correlate2D_td/_inter_td/combine/normalize + get_corr2d

Match GpuQuad's separate correlation calls: tp_proc_exec_corr2d_td (correlate2D TD, fat_zero=0,
corr_radius=0 -> gpu_corrs_td, returns num_corr_tiles), tp_proc_exec_corr2d_inter_td (correlate2D_inter
clt vs clt_ref, sel_sensors), tp_proc_exec_corr2d_combine (init|no_transpose<<1, num_pairs, pairs_mask
-> num_corr_combo), tp_proc_exec_corr2d_normalize (combo -> corrs_combo / per-pair -> gpu_corrs),
tp_proc_get_corr2d (per-pair de-pitch) + tp_proc_num_corr_tiles/combo. Add per-pair pixel buffer
gpu_corrs (+dstride_corr). The bundled tp_proc_exec_corr2d/StageProc path is retained.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>