Dismiss IBKR login messages during gateway startup

[Pigbibi]

Summary

• avoid empty GitHub add-mask commands for targets without TOTP
• dismiss the post-login IBKR Login Messages dialog from the watcher so API readiness is not blocked
• document the new Login Messages behavior

Verification

• python3 -m py_compile 2fa_bot.py
• bash tests/test_install_2fa_bot_watcher.sh
• bash tests/test_wait_for_ib_gateway_ready.sh
• bash tests/test_workflow_shared_config.sh
• bash tests/test_docker_compose_ports.sh
• git diff --check

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Plumb the dismiss toggle into the container environment

This new opt-out is only read inside 2fa_bot.py, but it is not passed through docker-compose.yml or the GitHub-generated env file in .github/workflows/main.yml, so setting IBKR_DISMISS_LOGIN_MESSAGES=no in .env or workflow variables will never reach the watcher container. In deployments that need to inspect the IBKR Login Messages dialog manually, the newly default-on dismissal cannot actually be disabled without editing the compose/service environment.

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