* refactor: improve typing with memory stream type aliases
Move memory stream type definitions to models.py and use them throughout
the codebase for better type safety and maintainability.
GitHub-Issue:#201
* refactor: move streams to ParsedMessage
* refactor: update test files to use ParsedMessage
Updates test files to work with the ParsedMessage stream type aliases
and fixes a line length issue in test_201_client_hangs_on_logging.py.
Github-Issue:#201
* refactor: rename ParsedMessage to MessageFrame for clarity
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
* refactor: move MessageFrame class to types.py for better code organization
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
* fix pyright
* refactor: update websocket client to use MessageFrame
Modified the websocket client to work with the new MessageFrame type,
preserving raw message text and properly extracting the root JSON-RPC
message when sending.
Github-Issue:#204
* fix: use NoneType instead of None for type parameters in MessageFrame
🤖 Generated with [Claude Code](https://claude.ai/code)
* refactor: rename root to message
Pydantic treats fields starting with underscore as private/hidden. To fix this,
we need to use Field with alias='_meta' to properly handle these fields while
keeping the external API unchanged. This fixes#103 where meta fields were not
being properly assigned in request contexts.
