Release blockers: docs drift, NPU status, hrx-system pin note, weekly.sh preflight

.gitmodules

@@ -16,6 +16,7 @@
 # HRX (docs/hrx.md), the engine's GPU route; also the tree of the CPU llama-server (Windows).
 # Needed with -DONEBIT_HRX=ON. Both trees are AMD's tested pair (ROCm/ggml-staging-automation) plus
 # our commits: llama.cpp on our fork's 1bit/hrx-vulkan-patched, hrx-system on our fork's 1bit/main
+# (the hrx-system pin is on 1bit/e3e6a976-pin-6, off 1bit/main for now: docs/hrx.md, "The pin is off 1bit/main")
 # (Loom and libhrx fixes, docs/hrx.md "Our hrx-system commits"). .github/workflows/bump-hrx.yml moves
 # the llama.cpp pin when AMD moves its pair; hrx-system is rebased by hand. The branch name still says "vulkan": AMD's pair
 # carried a Vulkan backend too, which the engine no longer builds (RFC #213 stage 3).