fix: sync package version metadata

[StatPan]

Summary

• sync assemblymcp.__version__ with the released project version 0.6.3
• refresh editable package version in uv.lock

Validation

• uv run pytest -q -> 67 passed
• real API smoke check -> bills, members, meetings, committees all returned data

[gemini-code-assist]

Code Review

This pull request updates the package version to 0.6.3 in both the source code and the lock file. Feedback was provided to implement dynamic versioning using importlib.metadata to ensure a single source of truth and prevent future synchronization issues between the package metadata and the source code.

[gemini-code-assist]

To avoid manual synchronization between pyproject.toml and __init__.py, consider retrieving the version dynamically from the package metadata. This ensures a single source of truth and prevents the version from becoming out-of-sync in future releases, as happened previously (0.1.0 vs 0.6.3).

Suggested change

	__version__ = "0.6.3"
	from importlib.metadata import version, PackageNotFoundError
	try:
	__version__ = version("assemblymcp")
	except PackageNotFoundError:
	# Fallback if the package is not installed
	__version__ = "0.6.3"

[StatPan]

Closing in favor of a refreshed PR based on current master/version 0.6.4. This branch was created before the automatic version bump landed, so it is stale against current master.