Ship portable CPU dispatch and verified shared runtime dependencies

docs/VALIDATION.md

@@ -7,6 +7,35 @@ and `SEARCHI_FORCE_CPU=1`.
 
 ## Current integration checkpoint (2026-10-12)
 
+The normal Windows x64 package now includes baseline and optimized CPU DLLs
+with CPU/OS feature checks, plus the Vulkan backend. Shared DLLs use a common
+MSVC CRT: a first `/MT` prototype crashed because model file handles crossed
+separate CRT instances; the corrected `/MD` package passes real-model startup.
+All 25 runtime DLLs and the worker have their non-Windows PE imports satisfied
+by packaged files. Windows system UCRT/WinRT and WebView2 remain platform
+requirements. This is dependency inspection, not clean-machine certification.
+
+Both extracted-archive tests passed: automatic CPU dispatch selected
+`ggml-cpu-cascadelake.dll`, and removing optimized modules from the temporary
+extraction selected `ggml-cpu-x64.dll`. Both produced genuine normalized 768d
+Google code vectors, started FFprobe, verified all 39 listed files, and confirmed
+the Vulkan module was not loaded. The unsigned archive is 145,196,878 bytes;
+its digest is recorded in [dispatch evidence](evidence/windows-package-cpu-dispatch.json)
+and [baseline evidence](evidence/windows-package-cpu-baseline.json).
+Recorded startup/query/exit times are diagnostic smoke samples, not comparable
+benchmarks: cache state and concurrent checks differ. Baseline inference on
+this modern VM does not certify older physical CPUs or operating systems.
+Three builder, five staging and eleven archive regression tests passed.
+Two real Google code tests and two text-reference/tail/debug parity tests also
+passed using the new shared worker in forced-CPU mode. Text reference cosine
+similarities range from 0.99983106 to 0.99993036; debug/normal query cosine is
+1.00000000. These verify runtime equivalence, not broad retrieval quality.
+The genuine Google media parity test also passed on this shared CPU runtime:
+image budgets 280/140/70 and the speech fixture all meet the 0.999 reference
+cosine threshold. Image/audio quality limitations and GPU gates remain open.
+
+The following evidence describes the earlier static worker checkpoint:
+
 The Windows-x64 universal worker built with CPU and Vulkan enabled, using the
 pinned official LunarG 1.4.363.0 SDK (download hash and publisher signature
 verified). Copy-only installation and later provenance/swap validation ran in