Allow protobuf 7.x runtime in dependency constraints

[Copilot]

This change updates aiocomfoconnect’s protobuf dependency range to permit protobuf 7.x, which removes the legacy pkg_resources namespace mechanism that triggers deprecation warnings in downstream Home Assistant usage. The existing generated protobuf modules remain compatible with the 7.x runtime.

• Dependency constraint update

  • Widened protobuf runtime constraint from ^6.31 to >=6.31,<8 in pyproject.toml.

• Lockfile synchronization

  • Updated poetry.lock metadata hash to reflect the new dependency constraint.

• No protobuf regeneration in this PR

  • Kept existing generated *_pb2.py files unchanged; this PR only adjusts runtime compatibility bounds.

# pyproject.toml
[tool.poetry.dependencies]
protobuf = ">=6.31,<8"