- /version returns JSON with build_date and git_commit from env vars
- NixOS module injects GIT_COMMIT (first 8 chars of self.rev)
and BUILD_DATE (self.lastModified) into systemd service environment
The embedding endpoint path was but OpenAI-compatible APIs
serve embeddings at . When EMBEDDING_BASE_URL is set to a
bare host (e.g. https://llm.aviron.ai), the resulting URL would be
/eembeddings instead of /v1/embeddings, returning 404.
Changed defaultBaseURL to not include /v1 and always use /v1/embeddings
as the endpoint path.