chore: add workspace metadata and crate READMEs for publishing

Add license, authors, repository, documentation, keywords, categories,
and readme fields to all crate Cargo.toml files. Add crate-level README
files for documentation.

Co-Authored-By: claude-flow <ruv@ruv.net>

rust-port/wifi-densepose-rs/crates/wifi-densepose-config/Cargo.toml

@@ -3,5 +3,12 @@ name = "wifi-densepose-config"
 version.workspace = true
 edition.workspace = true
 description = "Configuration management for WiFi-DensePose"
+license.workspace = true
+authors = ["rUv <ruv@ruv.net>", "WiFi-DensePose Contributors"]
+repository.workspace = true
+documentation.workspace = true
+keywords = ["wifi", "configuration", "densepose", "settings", "toml"]
+categories = ["config", "science"]
+readme = "README.md"
 
 [dependencies]

rust-port/wifi-densepose-rs/crates/wifi-densepose-config/README.md

@@ -0,0 +1,89 @@
+# wifi-densepose-config
+
+[![Crates.io](https://img.shields.io/crates/v/wifi-densepose-config.svg)](https://crates.io/crates/wifi-densepose-config)
+[![Documentation](https://docs.rs/wifi-densepose-config/badge.svg)](https://docs.rs/wifi-densepose-config)
+[![License](https://img.shields.io/crates/l/wifi-densepose-config.svg)](LICENSE)
+
+Configuration management for the WiFi-DensePose pose estimation system.
+
+## Overview
+
+`wifi-densepose-config` provides a unified configuration layer that merges values from environment
+variables, TOML/YAML files, and CLI overrides into strongly-typed Rust structs. Built on the
+[config](https://docs.rs/config), [dotenvy](https://docs.rs/dotenvy), and
+[envy](https://docs.rs/envy) ecosystem from the workspace.
+
+> **Status:** This crate is currently a stub. The intended API surface is documented below.
+
+## Planned Features
+
+- **Multi-source loading** -- Merge configuration from `.env`, TOML files, YAML files, and
+  environment variables with well-defined precedence.
+- **Typed configuration** -- Strongly-typed structs for server, signal processing, neural network,
+  hardware, and database settings.
+- **Validation** -- Schema validation with human-readable error messages on startup.
+- **Hot reload** -- Watch configuration files for changes and notify dependent services.
+- **Profile support** -- Named profiles (`development`, `production`, `testing`) with per-profile
+  overrides.
+- **Secret filtering** -- Redact sensitive values (API keys, database passwords) in logs and debug
+  output.
+
+## Quick Start
+
+```rust
+// Intended usage (not yet implemented)
+use wifi_densepose_config::AppConfig;
+
+fn main() -> anyhow::Result<()> {
+    // Loads from env, config.toml, and CLI overrides
+    let config = AppConfig::load()?;
+
+    println!("Server bind: {}", config.server.bind_address);
+    println!("CSI sample rate: {} Hz", config.signal.sample_rate);
+    println!("Model path: {}", config.nn.model_path.display());
+
+    Ok(())
+}
+```
+
+## Planned Configuration Structure
+
+```toml
+# config.toml
+
+[server]
+bind_address = "0.0.0.0:3000"
+websocket_path = "/ws/poses"
+
+[signal]
+sample_rate = 100
+subcarrier_count = 56
+hampel_window = 5
+
+[nn]
+model_path = "./models/densepose.rvf"
+backend = "ort"        # ort | candle | tch
+batch_size = 8
+
+[hardware]
+esp32_udp_port = 5005
+serial_baud = 921600
+
+[database]
+url = "sqlite://data/wifi-densepose.db"
+max_connections = 5
+```
+
+## Related Crates
+
+| Crate | Role |
+|-------|------|
+| [`wifi-densepose-core`](../wifi-densepose-core) | Shared types and traits |
+| [`wifi-densepose-api`](../wifi-densepose-api) | REST API (consumer) |
+| [`wifi-densepose-db`](../wifi-densepose-db) | Database layer (consumer) |
+| [`wifi-densepose-cli`](../wifi-densepose-cli) | CLI (consumer) |
+| [`wifi-densepose-sensing-server`](../wifi-densepose-sensing-server) | Sensing server (consumer) |
+
+## License
+
+MIT OR Apache-2.0