chore: update min supported python version to 3.11

[abn]

ExceptionGroups is not available in Python version prior to 3.11. The project uses them in gateway service implementation. I have updated the minimum version and the lock file.

mcp-context-forge/mcpgateway/services/gateway_service.py

Lines 242 to 253 in 47db767

	except* GatewayConnectionError as ge:
	logger.error("GatewayConnectionError in group: %s", ge.exceptions)
	raise ge.exceptions[0]
	except* ValueError as ve:
	logger.error("ValueErrors in group: %s", ve.exceptions)
	raise ve.exceptions[0]
	except* RuntimeError as re:
	logger.error("RuntimeErrors in group: %s", re.exceptions)
	raise re.exceptions[0]
	except* BaseException as other: # catches every other sub-exception
	logger.error("Other grouped errors: %s", other.exceptions)
	raise other.exceptions[0]

[crivetimihai]

Thanks for the PR. Will add tox to Actions.