python/v0.2.0

Added

• Add shared contract metadata for OpenAI TTS and Fish Audio clients.
• Add model-specific contract validation metadata for Gemini Omni Flash Preview text-to-video requests.
• Publish Gemini TTS model and input contract metadata for Provider Clients.
• Publish Seedream 5 Pro model and input contract metadata.

Changed

• Publish shared Python and Java contract metadata for the Midjourney prompt shortening request schema.
• Publish Seedream 5-Lite output format contract metadata.
• Publish advanced stem separation mode, stem values, and conditional validation metadata.

Fixed

• Preserve API-provided error codes, leave missing codes unset, and use SDK exception types for local failures.
• Recognize continuation request failures across HTTP 400, 409, 422, 429, and 503 responses.