fix: stabilize cli config and gateway update flows

[akillness]

Summary

• preserve Discord/Telegram skill command mappings after 32-char clamp and add regression tests
• make Hermes .env loading override stale shell env even when PYTHON_DOTENV_DISABLED=1
• keep first-install tools flow CLI-only and fix gateway/systemd + provider-config regression coverage
• add missing Hugging Face model metadata entry and harden related tests against ambient Copilot auth

Verification

• source venv/bin/activate && python -m pytest tests/hermes_cli/ -q
• source venv/bin/activate && python -m pytest tests/hermes_cli/test_commands.py tests/cli/test_cli_init.py tests/test_model_tools.py -q

[teknium1]

Thanks for the regression-focused work. There is still a real first-install scope bug, but this branch needs selective salvage onto current main.

Problems

• hermes_cli/tools_config.py:3973-4004 still detects token-configured platforms and loops through all of them during first_install=True; the CLI-only fix remains needed.
• The dotenv replacement cannot be transplanted unchanged: current hermes_cli/env_loader.py:154-164 uses load_dotenv() and then _sanitize_loaded_credentials(), which the proposed parser omits. The PR also adds no test with PYTHON_DOTENV_DISABLED=1.
• Command-key preservation already exists in hermes_cli/commands.py:722-758 with coverage at tests/hermes_cli/test_commands.py:1141-1211. agent/model_metadata.py:340 already has the MiniMax entry at the official 204800 value from d442f25a2f41cd55281ca09c967bce9a93203e5c; do not reintroduce 1048576.

Suggested changes

• Re-scope to the first-install fix with a messaging-token regression test.
• Rework the dotenv fix against the current loader while preserving its parser and credential-sanitization behavior, and test the disabled flag explicitly.

Automated hermes-sweeper review.