Update dependencies to latest versions (wgpu 27, tokio 1.48, axum 0.8)

Major dependency updates:
- wgpu: 0.19 → 27.0 (Arc-based resources, new API patterns)
- tokio: 1.35 → 1.48 (improved scheduling)
- thiserror: 1.0 → 2.0 (derive macro updates)
- axum: 0.7 → 0.8 (improved routing)
- tower: 0.4 → 0.5 (service updates)
- tonic/prost: 0.11/0.12 → 0.14 (gRPC updates)
- winit: 0.29 → 0.30 (new window API)
- egui: 0.27 → 0.31 (wgpu 27 compatibility)
- glam: 0.27 → 0.29
- metal: 0.27 → 0.31
- rayon: 1.10 → 1.11
- arrow: 52 → 54
- polars: 0.39 → 0.46

wgpu 27.0 migration changes:
- Instance::new() now takes reference
- request_adapter() returns Result not Option
- DeviceDescriptor uses ..Default::default() for new fields
- Pipeline entry_point is now Option<&str>
- Added compilation_options and cache to pipelines
- ImageCopyTexture → TexelCopyTextureInfo
- ImageDataLayout → TexelCopyBufferLayout
- Maintain::Wait → PollType::wait_indefinitely()

Deferred updates (breaking changes):
- iced: 0.13 (0.14 requires major API rewrite)
- rkyv: 0.7 (0.8 has incompatible data format)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: mivertowski

CHANGELOG.md

@@ -35,6 +35,31 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added `CooperativeKernel` wrapper in `ringkernel-cuda::cooperative` module
 - Added cooperative kernel infrastructure to wavesim3d benchmark
 
+#### Dependency Updates
+- **tokio**: 1.35 → 1.48 (improved task scheduling, better cancellation handling)
+- **thiserror**: 1.0 → 2.0 (updated derive macros)
+- **wgpu**: 0.19 → 27.0 (Arc-based resource tracking, 40%+ performance improvement)
+  - Migrated to new Instance/Adapter/Device creation API
+  - Updated pipeline descriptors with `entry_point: Option<&str>`, `compilation_options`, `cache`
+  - Renamed `ImageCopyTexture` → `TexelCopyTextureInfo`, `ImageDataLayout` → `TexelCopyBufferLayout`
+  - Updated `device.poll()` to use `PollType::wait_indefinitely()`
+- **winit**: 0.29 → 0.30 (new window creation API)
+- **egui/egui-wgpu/egui-winit**: 0.27 → 0.31 (updated for wgpu 27 compatibility)
+- **glam**: 0.27 → 0.29 (linear algebra updates)
+- **metal**: 0.27 → 0.31 (Apple GPU backend updates)
+- **axum**: 0.7 → 0.8 (improved routing, better error handling)
+- **tower**: 0.4 → 0.5 (service abstraction updates)
+- **tonic**: 0.11 → 0.14 (better gRPC streaming, improved health checking)
+- **prost**: 0.12 → 0.14 (protobuf updates to match tonic)
+- **actix-rt**: 2.9 → 2.10
+- **rayon**: 1.10 → 1.11 (requires MSRV 1.80)
+- **arrow**: 52 → 54 (columnar data updates)
+- **polars**: 0.39 → 0.46 (DataFrame updates)
+
+#### Deferred Updates
+- **iced**: Kept at 0.13 (0.14 requires major application API rewrite)
+- **rkyv**: Kept at 0.7 (0.8 has incompatible data format, requires significant migration)
+
 ## [0.1.2] - 2025-12-11
 
 ### Added

CLAUDE.md

@@ -565,3 +565,83 @@ async fn main() -> std::result::Result<(), Box<dyn std::error::Error>> {
     // ...
 }
 ```
+
+**wgpu 27.0 API (Updated):**
+
+The WebGPU backend uses wgpu 27.0 with Arc-based resource tracking:
+
+```rust
+// Instance creation (takes reference now)
+let instance = wgpu::Instance::new(&wgpu::InstanceDescriptor {
+    backends: wgpu::Backends::all(),
+    ..Default::default()
+});
+
+// Adapter request (returns Result, not Option)
+let adapter = instance
+    .request_adapter(&wgpu::RequestAdapterOptions { ... })
+    .await
+    .map_err(|e| format!("No adapter: {}", e))?;
+
+// Device request (use ..Default::default() for new fields)
+let (device, queue) = adapter
+    .request_device(&wgpu::DeviceDescriptor {
+        label: Some("device"),
+        required_features: wgpu::Features::empty(),
+        required_limits: wgpu::Limits::default(),
+        ..Default::default()  // memory_hints, etc.
+    })
+    .await?;
+
+// Pipeline creation (entry_point is now Option, add compilation_options and cache)
+let pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
+    vertex: wgpu::VertexState {
+        module: &shader,
+        entry_point: Some("vs_main"),  // Option<&str> now
+        compilation_options: Default::default(),
+        buffers: &[...],
+    },
+    fragment: Some(wgpu::FragmentState {
+        entry_point: Some("fs_main"),
+        compilation_options: Default::default(),
+        ...
+    }),
+    cache: None,  // New required field
+    ...
+});
+
+// Texture copy (renamed types)
+queue.write_texture(
+    wgpu::TexelCopyTextureInfo { ... },  // was ImageCopyTexture
+    &data,
+    wgpu::TexelCopyBufferLayout { ... }, // was ImageDataLayout
+    size,
+);
+
+// Device polling (returns Result now)
+let _ = device.poll(wgpu::PollType::wait_indefinitely());
+```
+
+## Dependency Versions
+
+Key workspace dependencies (as of v0.1.3):
+
+| Category | Package | Version | Notes |
+|----------|---------|---------|-------|
+| **Runtime** | tokio | 1.48 | Full async runtime |
+| **Runtime** | rayon | 1.11 | Parallel iterators |
+| **Error** | thiserror | 2.0 | Derive macros |
+| **GPU** | cudarc | 0.18.2 | CUDA bindings |
+| **GPU** | wgpu | 27.0 | WebGPU (Arc-based) |
+| **GPU** | metal | 0.31 | Apple Metal |
+| **Web** | axum | 0.8 | HTTP framework |
+| **Web** | tower | 0.5 | Service abstractions |
+| **gRPC** | tonic | 0.14 | gRPC framework |
+| **gRPC** | prost | 0.14 | Protobuf |
+| **Serialize** | rkyv | 0.7 | Zero-copy |
+| **GUI** | iced | 0.13 | Elm-style GUI |
+| **GUI** | egui | 0.31 | Immediate mode GUI |
+| **GUI** | winit | 0.30 | Window management |
+| **Math** | glam | 0.29 | Linear algebra |
+| **Data** | arrow | 54 | Columnar data |
+| **Data** | polars | 0.46 | DataFrames |