Release v0.3.4

Breaking Changes

• None

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New Features

• Add streaming_timeout_ms to OpenCodeGoConfig and OpenCodeZenConfig for per‑request streaming timeouts.
• Expose heartbeat_paused flag during raw Anthropic streaming to avoid keep‑alive injection into SSE frames.
• Add IsAnthropicModel and isAnthropicNativeGo helpers that now include minimax‑m2.5/2.7/3 and qwen‑plus models.
• Add RequestTimeout, StreamingTimeout, and StreamIdleTimeout helpers on OpenCodeClient.
• Add walkthrough.md documenting integration and timeout configuration.

Bug Fixes

• Fix streaming timeout handling: bind streaming body reads to the per‑attempt context so mid‑stream stalls abort.
• Prevent panic when transformTools receives a whitespace‑only "null" schema.
• Stop fallback chain early on parent context cancellation or deadline exceeded; do not record client cancellations as circuit‑breaker failures.
• Correct error handling in Anthropic API calls, surface ErrStreamReadCanceled, and streamline SSE error messages.
• Resolve lint issues in test files (discard unused return values, remove redundant type assertions).
• Fix concurrent write handling in TestResponseWriter by using Fprintf.

Improvements

• Harden transformTools: skip empty/whitespace names, normalize null/empty schemas, validate object type and properties, guard against nil schema objects.
• Update ApplyDefaults to honor streaming_timeout_ms before timeout_ms when the former is unset.
• Optimize retry logic and error handling with a dedicated APIError type.
• Reload messaging in atomic.go now reports timeout changes immediately.
• Add per‑byte idle‑gap enforcement via StreamIdleTimeout.

Documentation

• Update CONFIGURATION.md and README.md with Streaming Scenario Routing and new streaming_timeout_ms config.
• Add streaming_timeout_ms to config.example.json.
• Expand documentation for new timeout helpers and Anthropic‑native streaming behavior.

Chores

• Add extensive test coverage for new streaming and timeout features.
• Update test files and remove lint warnings.
• Minor refactorings in provider architecture and fallback logic.
• Update CI configuration and dependency checks.