[aien-spark]

Drift sync for omega-mv 0243e4aff88937b4e616d8e211d47084aca2befe (omega-mv#579 squash).

Before, on CUDApp main 9b3e44e:

DRIFT	Makefile	differs	6011dfa5d7d883b01ac3671f630499ef5f9d1fcc
DRIFT	src/omega_blackwell_gates.c	omega-only	3c248417e031c4e19ebe4ac56b8e56efdae09399
DRIFT-GATE: FAIL (2 of 784 GPU paths changed in omega 0243e4aff889 and not in CUDA++)

Both changes are Omega-side only, so this is a baseline refresh with no byte sync:

• src/omega_blackwell_gates.c is a stay.txt bridge; CUDA++ does not carry or build it.
• The omega Makefile delta adds src/omega_clean_clone.c (new Omega bridge, not a GPU path per map.sh) to Omega's SRCS and filters it out of libomega_gpu.a. CUDA++ keeps its own build and builds none of gates/world_gates/clean_clone.

After (tools/extract/drift.sh --self-test):

control 1: red as required (Makefile)
control 2: red as required (src/omega_gpu_attention_api.c edited in a scratch Omega commit)
DRIFT-GATE: PASS (784 GPU paths, omega 0243e4aff889, none moved away from CUDA++ since the baseline)
SELF-TEST: PASS (both controls red, real check green)

Host: make -j2 exit 0. crumb verify OK (33 crumbs) before and after commit.