What does this PR do?

Fixes an issue where LM Studio local endpoints were not consistently resolving through the custom-provider runtime path.

In the failing cases, LM Studio-style local providers could miss the intended custom-provider path and behave like generic custom/OpenRouter fallbacks. This could cause:

• local endpoint aliases not resolving as expected.
• LM_STUDIO_* env vars not being honored reliably.
• local endpoints incorrectly inheriting OpenRouter fallback behavior.

Related Issue

Fixes #12146 #4172

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 🔒 Security fix
• 📝 Documentation update
• ✅ Tests (adding or improving test coverage)
• ♻️ Refactor (no behavior change)
• 🎯 New skill (bundled or hub)

Changes Made

• Normalized lm-studio / lmstudio aliases during runtime provider resolution (hermes_cli/runtime_provider.py).
• Honored LM_STUDIO_BASE_URL and LM_STUDIO_API_KEY for local LM Studio endpoints.
• Prevented local custom endpoints from incorrectly falling back to OPENROUTER_API_KEY.
• Added regression tests covering LM Studio alias resolution and local-endpoint credential selection (tests/hermes_cli/test_runtime_provider_resolution.py).

How to Test

1. Run the targeted runtime provider resolution test file locally: pytest tests/hermes_cli/test_runtime_provider_resolution.py -q
2. Verify that runtime resolution tests for lm-studio / lmstudio pass successfully.
3. Verify that tests for LM_STUDIO_BASE_URL pass and ensure local endpoints do not fall back to OPENROUTER_API_KEY.

Checklist

Code

• I've read the Contributing Guide
• My commit messages follow Conventional Commits (fix(scope):, feat(scope):, etc.)
• I searched for existing PRs to make sure this isn't a duplicate
• My PR contains only changes related to this fix/feature (no unrelated commits)
• I've run pytest tests/ -q and all tests pass
• I've added tests for my changes (required for bug fixes, strongly encouraged for features)
• I've tested on my platform: Local environment

Documentation & Housekeeping

• I've updated relevant documentation (README, docs/, docstrings) — or N/A
• I've updated cli-config.yaml.example if I added/changed config keys — or N/A
• I've updated CONTRIBUTING.md or AGENTS.md if I changed architecture or workflows — or N/A
• I've considered cross-platform impact (Windows, macOS) per the compatibility guide — or N/A
• I've updated tool descriptions/schemas if I changed tool behavior — or N/A

Screenshots / Logs

(N/A)