feat: Complete Rust port of WiFi-DensePose with modular crates

Major changes:
- Organized Python v1 implementation into v1/ subdirectory
- Created Rust workspace with 9 modular crates:
  - wifi-densepose-core: Core types, traits, errors
  - wifi-densepose-signal: CSI processing, phase sanitization, FFT
  - wifi-densepose-nn: Neural network inference (ONNX/Candle/tch)
  - wifi-densepose-api: Axum-based REST/WebSocket API
  - wifi-densepose-db: SQLx database layer
  - wifi-densepose-config: Configuration management
  - wifi-densepose-hardware: Hardware abstraction
  - wifi-densepose-wasm: WebAssembly bindings
  - wifi-densepose-cli: Command-line interface

Documentation:
- ADR-001: Workspace structure
- ADR-002: Signal processing library selection
- ADR-003: Neural network inference strategy
- DDD domain model with bounded contexts

Testing:
- 69 tests passing across all crates
- Signal processing: 45 tests
- Neural networks: 21 tests
- Core: 3 doc tests

Performance targets:
- 10x faster CSI processing (~0.5ms vs ~5ms)
- 5x lower memory usage (~100MB vs ~500MB)
- WASM support for browser deployment

.claude/helpers/post-commit

@@ -0,0 +1,16 @@
+#!/bin/bash
+# Claude Flow Post-Commit Hook
+# Records commit metrics and trains patterns
+
+COMMIT_HASH=$(git rev-parse HEAD)
+COMMIT_MSG=$(git log -1 --pretty=%B)
+
+echo "📊 Recording commit metrics..."
+
+# Notify claude-flow of commit
+npx @claude-flow/cli hooks notify \
+  --message "Commit: $COMMIT_MSG" \
+  --level info \
+  --metadata '{"hash": "'$COMMIT_HASH'"}' 2>/dev/null || true
+
+echo "✅ Commit recorded"