Update to 2026-09-17 pipeline snapshot; add weights, L20 assets and recording via Git LFS

Source: RGB-D -> Dyn-HaMR -> L20 retargeting -> FoundationPose -> reference repair -> SPIDER,
documented in docs/PIPELINE_LATEST.md and docs/SETUP_AND_WEIGHTS.md. Adds FoundationPose and
nvdiffrast upstream snapshots, requirements/pipeline_venv.txt and the FoundationPose weight
manifest/downloader.

Assets (Git LFS): weights/ (WiLoR detector, HandFlow denoiser, UniDepth-L), FoundationPose
checkpoints, HaMeR checkpoint, Dyn-HaMR HMP model and BMC constraints, L20 URDF/meshes, the
20260915_171525 D405 recording and the two box CADs. MANO models are not redistributed
(third_party/hamer/_DATA/data/mano/README.txt). Environments, caches and run outputs excluded.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

third_party/FoundationPose/mycpp/CMakeLists.txt

@@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.15)
+project(mycpp)
+
+
+set(CMAKE_BUILD_TYPE Release)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14 -fopenmp -g3 -O3")
+
+
+find_package(Boost REQUIRED COMPONENTS system program_options)
+find_package(OpenMP REQUIRED)
+find_package(Eigen3 REQUIRED)
+find_package(pybind11 REQUIRED)
+
+include_directories(
+  include
+  ${BLAS_INCLUDE_DIR}
+)
+
+file(GLOB MY_SRC ${PROJECT_SOURCE_DIR}/src/*.cpp)
+
+set(PYBIND11_CPP_STANDARD -std=c++14)
+
+pybind11_add_module(mycpp src/app/pybind_api.cpp ${MY_SRC})
+target_link_libraries(mycpp PRIVATE ${Boost_LIBRARIES} ${OpenMP_CXX_FLAGS} Eigen3::Eigen)