[CHORE]: Achieve 100% docstring coverage (make interrogate) - currently at 96.3%

[crivetimihai]

✅ [CHORE]: Achieve 100% docstring coverage

Summary

Increase docstring coverage from 96.3% to 100% by adding missing docstrings to 30 functions/methods.

Requirements

• All docstrings must use Google docstring format
• Include *Examples- sections with doctests where applicable
• Must pass make pydocstyle
• Existing tests must continue to pass: make pylint test doctest flake8

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✅ Checklist of missing docstrings (30 total)

config.py

• Settings._parse_allowed_origins()
• Settings._parse_federation_peers()

main.py

• validation_exception_handler()
• database_exception_handler()

schemas.py

• GatewayRead._populate_auth()

translate.py

• _PubSub.__init__()
• StdIOEndpoint.__init__()
• _build_fastapi.get_sse.event_gen()
• _run_stdio_to_sse._shutdown()
• _run_sse_to_stdio.read_stdout()
• _run_sse_to_stdio.pump_sse_to_stdio()

alembic/env.py

• (module-level docstring)

alembic/versions/b77ca9d2de7e_uuid_pk_and_slug_refactor.py

• _use_batch()
• upgrade()
• downgrade()

cache/session_registry.py

• SessionRegistry.add_session._db_add()
• SessionRegistry.get_session._db_check()
• SessionRegistry.remove_session._db_remove()
• SessionRegistry.broadcast._db_add()
• SessionRegistry.respond._db_read_session()
• SessionRegistry.respond._db_read()
• SessionRegistry.respond._db_remove()
• SessionRegistry.respond.message_check_loop()
• SessionRegistry._db_cleanup_task._db_cleanup()
• SessionRegistry._db_cleanup_task._refresh_session()

services/server_service.py

• ServerNameConflictError.__init__()
• ServerService.__init__()

utils/create_jwt_token.py

• _parse_args()
• _payload_from_cli()
• main()

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✅ Validation checklist

• make interrogate shows 100%
• make pydocstyle passes -> separate issue
• make pylint test doctest flake8 passes