Two in-stage fixes for v0.51.19 batch:
1) api/config.py — add resolve_alias=False param to
_resolve_configured_provider_id() and pass it from
resolve_model_provider(). The PR #1818 swap from
_resolve_provider_alias() to _resolve_configured_provider_id()
was correct for active-provider/badge surfaces but broke #1625's
local-server-provider literal-preservation contract: 'ollama' →
'custom' and 'lm-studio' → 'lmstudio' alias-collapse caused
_LOCAL_SERVER_PROVIDERS membership check to miss, breaking the
model-id full-path preservation for LM Studio/Ollama. The new
flag preserves the raw provider value when called from
resolve_model_provider, and named-custom-slug + base-url
fallback both still run unchanged.
2) tests/test_bootstrap_discover_agent.py — pin Path.home() in
_isolate_discover_agent_dir so the hard-coded
'Path.home() / .hermes / hermes-agent' / 'Path.home() /
hermes-agent' candidates in discover_agent_dir() can't pick up
the dev machine's real install. The original PR #1817 isolation
helper covered HERMES_HOME, HERMES_WEBUI_AGENT_DIR, and
REPO_ROOT but missed the Path.home() leak.
Both surfaced on full pytest pre-release gate, fixed in stage,
ship in v0.51.19. Tests: full suite green.