refactor: Migrate to typing.Self and remove __future__ annotations.

[allenporter]

This removes the use of future annotations which are converting all the types to string, making it harder to do type reflection.

This is needed to simplify #746

One instance of annotations is left that would otherwise cause a circular import and needs to be fixed.

[Copilot]

Pull request overview

Refactors type annotations across the library to remove from __future__ import annotations (so annotations remain real runtime types for reflection) and migrates a few self-referential annotations to typing.Self, helping unblock upcoming feature work (e.g., #746).

Changes:

• Removed from __future__ import annotations from a set of modules to avoid stringified annotations at runtime.
• Introduced typing.Self and updated a few method annotations to use it (notably Enum _missing_ and DeviceProp.update).
• Adjusted one self-referential annotation to a quoted forward reference to keep runtime import behavior working without __future__.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
roborock/web_api.py	Drops __future__ annotations to preserve runtime type objects.
roborock/util.py	Drops __future__ annotations to preserve runtime type objects.
roborock/roborock_typing.py	Imports/uses typing.Self for DeviceProp.update.
roborock/roborock_message.py	Imports/uses typing.Self for Enum _missing_ typing.
roborock/protocol.py	Drops __future__ annotations to preserve runtime type objects.
roborock/exceptions.py	Drops __future__ annotations to preserve runtime type objects.
roborock/diagnostics.py	Drops __future__ annotations; introduces a quoted forward reference for a self-type.
roborock/devices/traits/v1/network_info.py	Drops __future__ annotations to preserve runtime type objects.
roborock/devices/traits/b01/q7/clean_summary.py	Drops __future__ annotations to preserve runtime type objects.
roborock/devices/rpc/b01_q10_channel.py	Drops __future__ annotations to preserve runtime type objects.
roborock/data/v1/v1_code_mappings.py	Imports/uses typing.Self for Enum _missing_ typing.
roborock/data/code_mappings.py	Updates RoborockEnum classmethod annotations to use Self.
roborock/broadcast_protocol.py	Drops __future__ annotations to preserve runtime type objects.

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