Fix Pydantic deprecation warnings in schemas

[jinglemansweep]

Replace deprecated class Config with model_config = ConfigDict() in all response model classes to comply with Pydantic V2 standards and eliminate deprecation warnings about removal in V3.

[Copilot]

Pull request overview

This PR migrates Pydantic model configurations from the deprecated V1 class Config pattern to the Pydantic V2 model_config = ConfigDict() pattern, addressing deprecation warnings about removal in Pydantic V3. The changes ensure all response model classes in the API schemas follow modern Pydantic V2 standards.

• Adds ConfigDict to the Pydantic imports
• Replaces all class Config: from_attributes = True with model_config = ConfigDict(from_attributes=True) across 6 response model classes
• Includes an unrelated formatting change to a test query

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/meshcore_api/api/schemas.py	Updates all 6 response model classes (NodeResponse, MessageResponse, AdvertisementResponse, TracePathResponse, TelemetryResponse, SignalStrengthResponse) to use Pydantic V2's model_config pattern and adds ConfigDict import
tests/unit/test_signal_strength.py	Contains an unrelated formatting change that consolidates a multi-line query into a single line, which is inconsistent with existing patterns in the same file

[Copilot]

This formatting change is unrelated to the PR's purpose of fixing Pydantic deprecation warnings. Additionally, it's inconsistent with the multi-line formatting used for similar queries elsewhere in this file (lines 150-154 and 185-189). Consider reverting this change to maintain consistency with the existing code style, or apply the formatting change consistently across all similar query patterns in the file.

Suggested change

	session.query(SignalStrength).filter(SignalStrength.trace_path_id == 100).all()
	session.query(SignalStrength)
	.filter(SignalStrength.trace_path_id == 100)
	.all()