Canonicalize OpenRouter model catalog discovery

[g-guthrie]

Summary

This PR removes the hand-coded OpenRouter model snapshot from Hermes and makes the OpenRouter picker/model catalog derive only from OpenRouter's live /v1/models API.

What changed

• removed the static OPENROUTER_MODELS snapshot from hermes_cli/models.py
• made fetch_openrouter_models() build the catalog directly from OpenRouter's live /v1/models response
• removed the models.dev fallback so OpenRouter model discovery has a single source of truth
• updated list_authenticated_providers() to use the dynamic OpenRouter picker catalog instead of a baked-in list
• added regression tests to ensure /model consumes the discovered OpenRouter catalog

Why

The goal here is specifically to stop requiring manual source updates whenever OpenRouter adds or changes models. OpenRouter models should come from OpenRouter itself, not from a hand-maintained Hermes list or a secondary fallback source.

Testing

Ran:

• /Users/gguthrie/Desktop/Hermes-Agent/venv/bin/python3.11 -m pytest -o addopts='' tests/hermes_cli/test_models.py tests/hermes_cli/test_model_switch_custom_providers.py tests/hermes_cli/test_model_validation.py tests/hermes_cli/test_opencode_go_in_model_list.py -q

Result:

• 113 passed

Supersedes

• Group OpenRouter picker entries across CLI and gateway #9460

[teknium1]

Closing as superseded by #16033.

Triage notes (medium confidence):
PR #16033 (merged) introduced a remote model catalog manifest (get_curated_openrouter_models) consumed by fetch_openrouter_models in hermes_cli/models.py:1134, removing the manual-snapshot maintenance burden this PR targets while keeping OPENROUTER_MODELS only as a deep fallback.

Thanks for the contribution — the underlying problem this PR addresses has been resolved by the linked PR on current main. If you believe this was closed in error, please comment and we'll reopen.

(Bulk-closed during a CLI PR triage sweep.)