feat: checkpoint batching and release-gate stories

.scratch/distributed-gguf-runtime/evidence/DGR-012/commands.txt

@@ -0,0 +1,24 @@
+# DGR-012 — exact commands (run from the worktree root)
+# Default venv (Python 3.14); deterministic, download-free, GPU-free, API-credit-free.
+VP=/run/media/popov/d/DEV/repos/d-popov.com/AI/.venv/bin/python
+
+# Targeted story tests
+$VP -m pytest -q tests/test_batch_scheduler.py
+# -> 16 passed
+
+# Dependency (DGR-007) still green — scheduler builds on this KV manager
+$VP -m pytest -q tests/test_hot_kv_state.py
+# -> 22 passed
+
+# Python quality gates
+$VP -m compileall -q packages tests
+# -> exit 0
+git diff --check
+# -> exit 0
+
+# Regenerate the machine-readable concurrency-sweep evidence
+$VP .scratch/distributed-gguf-runtime/evidence/DGR-012/generate_evidence.py
+# -> writes results.json; saturation_concurrency=8 corruption_free=True
+
+# Full deterministic suite (records the pre-existing unrelated failure baseline)
+$VP -m pytest -q -rfE -p no:cacheprovider