chore(repo): rename rust-port/wifi-densepose-rs → v2/ (flatten to one level) (#427)

The Rust port lived two directories deep (rust-port/wifi-densepose-rs/)
without any sibling under rust-port/ that warranted the extra level.
Move the whole workspace up to v2/ to match v1/ (Python) at the same
depth and shorten every cd / build command across the repo.

git mv preserves history for all tracked files. 60 files updated for
path references (CI workflows, ADRs, docs, scripts, READMEs, internal
.claude-flow state). Two manual fixes for relative-cd paths in
CLAUDE.md and ADR-043 that became wrong after the depth change
(cd ../.. → cd ..).

Validated:
- cargo check --workspace --no-default-features → clean (after target/
  nuke; the gitignored target/ was carried by the OS rename and had
  hard-coded old paths in build scripts)
- cargo test --workspace --no-default-features → 1,539 passed, 0 failed,
  8 ignored (same totals as pre-rename)
- ESP32-S3 on COM7 → still streaming live CSI (cb #40300, RSSI -64 dBm)

After-merge follow-up: contributors should `rm -rf v2/target` once and
let cargo regenerate from the new path.

scripts/gcloud-train.sh

@@ -263,7 +263,7 @@ export LIBTORCH=\$(python3 -c "import torch; print(torch.__path__[0] + '/lib')")
 export LD_LIBRARY_PATH="\${LIBTORCH}:\${LD_LIBRARY_PATH:-}"
 
 # Build the training binary with tch-backend
-cd ~/wifi-densepose/rust-port/wifi-densepose-rs
+cd ~/wifi-densepose/v2
 echo "Building with LIBTORCH=\$LIBTORCH ..."
 cargo build --release --features tch-backend --bin train 2>&1 | tail -5
 
@@ -325,7 +325,7 @@ set -euo pipefail
 source \$HOME/.cargo/env
 export LIBTORCH=\$(python3 -c \"import torch; print(torch.__path__[0] + '/lib')\")
 export LD_LIBRARY_PATH=\"\${LIBTORCH}:\${LD_LIBRARY_PATH:-}\"
-cd ~/wifi-densepose/rust-port/wifi-densepose-rs
+cd ~/wifi-densepose/v2
 
 # Set auto-shutdown timer (safety net)
 sudo shutdown -P +$((MAX_HOURS * 60)) &
@@ -408,7 +408,7 @@ mkdir -p "$LOCAL_RESULTS"
 
 # Package results on the VM
 gcloud compute ssh "$INSTANCE_NAME" --zone="$ZONE" --command="
-cd ~/wifi-densepose/rust-port/wifi-densepose-rs
+cd ~/wifi-densepose/v2
 tar czf ~/training-artifacts.tar.gz \
     checkpoints/ \
     logs/ \

scripts/generate-witness-bundle.sh

@@ -60,7 +60,7 @@ with open('$BUNDLE_DIR/proof/reference_signal_metadata.json', 'w') as f:
 # ---------------------------------------------------------------
 echo "[3/7] Running Rust test suite..."
 mkdir -p "$BUNDLE_DIR/test-results"
-cd "$REPO_ROOT/rust-port/wifi-densepose-rs"
+cd "$REPO_ROOT/v2"
 cargo test --workspace --no-default-features 2>&1 | tee "$BUNDLE_DIR/test-results/rust-workspace-tests.log" | tail -5
 # Extract summary
 grep "^test result" "$BUNDLE_DIR/test-results/rust-workspace-tests.log" | \
@@ -98,7 +98,7 @@ fi
 # ---------------------------------------------------------------
 echo "[6/7] Generating crate manifest..."
 mkdir -p "$BUNDLE_DIR/crate-manifest"
-for crate_dir in "$REPO_ROOT/rust-port/wifi-densepose-rs/crates/"*/; do
+for crate_dir in "$REPO_ROOT/v2/crates/"*/; do
   crate_name="$(basename "$crate_dir")"
   if [ -f "$crate_dir/Cargo.toml" ]; then
     version=$(grep '^version' "$crate_dir/Cargo.toml" | head -1 | sed 's/.*"\(.*\)".*/\1/')

scripts/qemu-mesh-test.sh

@@ -82,7 +82,7 @@ PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
 
 FIRMWARE_DIR="$PROJECT_ROOT/firmware/esp32-csi-node"
 BUILD_DIR="$FIRMWARE_DIR/build"
-RUST_DIR="$PROJECT_ROOT/rust-port/wifi-densepose-rs"
+RUST_DIR="$PROJECT_ROOT/v2"
 PROVISION_SCRIPT="$FIRMWARE_DIR/provision.py"
 VALIDATE_SCRIPT="$SCRIPT_DIR/validate_mesh_test.py"
 

scripts/qemu_swarm.py

@@ -46,7 +46,7 @@ except ImportError:
 SCRIPT_DIR = Path(__file__).resolve().parent
 PROJECT_ROOT = SCRIPT_DIR.parent
 FIRMWARE_DIR = PROJECT_ROOT / "firmware" / "esp32-csi-node"
-RUST_DIR = PROJECT_ROOT / "rust-port" / "wifi-densepose-rs"
+RUST_DIR = PROJECT_ROOT / "v2" / "wifi-densepose-rs"
 PROVISION_SCRIPT = FIRMWARE_DIR / "provision.py"
 PRESETS_DIR = SCRIPT_DIR / "swarm_presets"