feat: Add wifi-densepose-mat disaster detection module

Implements WiFi-Mat (Mass Casualty Assessment Tool) for detecting and
localizing survivors trapped in rubble, earthquakes, and natural disasters.

Architecture:
- Domain-Driven Design with bounded contexts (Detection, Localization, Alerting)
- Modular Rust crate integrating with existing wifi-densepose-* crates
- Event-driven architecture for audit trails and distributed deployments

Features:
- Breathing pattern detection from CSI amplitude variations
- Heartbeat detection using micro-Doppler analysis
- Movement classification (gross, fine, tremor, periodic)
- START protocol-compatible triage classification
- 3D position estimation via triangulation and depth estimation
- Real-time alert generation with priority escalation

Documentation:
- ADR-001: Architecture Decision Record for wifi-Mat
- DDD domain model specification

rust-port/wifi-densepose-rs/crates/wifi-densepose-mat/src/integration/mod.rs

@@ -0,0 +1,49 @@
+//! Integration layer (Anti-Corruption Layer) for upstream crates.
+//!
+//! This module provides adapters to translate between:
+//! - wifi-densepose-signal types and wifi-Mat domain types
+//! - wifi-densepose-nn inference results and detection results
+//! - wifi-densepose-hardware interfaces and sensor abstractions
+
+mod signal_adapter;
+mod neural_adapter;
+mod hardware_adapter;
+
+pub use signal_adapter::SignalAdapter;
+pub use neural_adapter::NeuralAdapter;
+pub use hardware_adapter::HardwareAdapter;
+
+/// Configuration for integration layer
+#[derive(Debug, Clone, Default)]
+pub struct IntegrationConfig {
+    /// Use GPU acceleration if available
+    pub use_gpu: bool,
+    /// Batch size for neural inference
+    pub batch_size: usize,
+    /// Enable signal preprocessing optimizations
+    pub optimize_signal: bool,
+}
+
+/// Error type for integration layer
+#[derive(Debug, thiserror::Error)]
+pub enum AdapterError {
+    /// Signal processing error
+    #[error("Signal adapter error: {0}")]
+    Signal(String),
+
+    /// Neural network error
+    #[error("Neural adapter error: {0}")]
+    Neural(String),
+
+    /// Hardware error
+    #[error("Hardware adapter error: {0}")]
+    Hardware(String),
+
+    /// Configuration error
+    #[error("Configuration error: {0}")]
+    Config(String),
+
+    /// Data format error
+    #[error("Data format error: {0}")]
+    DataFormat(String),
+}