v1.0.0-beta3

Changes

• Disable all upstream request retries; every MCP image request is attempted exactly once.
• Keep existing preset timeout values unchanged.
• Return an acknowledgement one second after the upstream response while decoding, URL download, validation, and persistence continue in a background thread.
• Return source_url for URL responses with guidance to prefer the persisted save_path.
• Return response format and estimated file size for base64/inlineData responses without URL or provider extras.
• Apply the same asynchronous persistence behavior to official and temporary image tools.

Verification

• uv run ruff check image_generate_mcp_remote tests
• uv run pytest -q (36 passed)
• wheel and sdist built successfully