P10 (WIP): release build script, Dockerfile, conda recipes, fresh-VM acceptance task

scripts/build_dist.sh: sdist + pure wheel + manylinux_2_28 kernel wheels (maturin --zig,
both architectures). Dockerfile (multi-stage, kernels included, non-root user).
packaging/conda/{simurg,simurg-core}. scripts/p10/digest.py: platform-independent content
digests of GTC/VCF/summary outputs. Cloud task p10 installs the artifacts on a fresh
Ubuntu VM and runs the tutorial with pip, Docker and conda installs. trial.sh picks the
arm64/amd64 image from the instance type and can run instances in parallel (PARALLEL=1).
Licence files ship in both wheels; Rust crate notices added.

.dockerignore

@@ -0,0 +1,14 @@
+.git
+.venv
+data
+refs
+dist
+results
+_phase0_archive
+**/__pycache__
+**/target
+*.idat
+*.idat.gz
+*.bpm
+*.egt
+*.gtc