Replace the silent placeholder-UUID fallback in
_GraphNamespace.add_batch with logger.exception(...) + raise so
embedder misconfiguration (404 unknown model, connection refused, etc.)
fails the surrounding graph-build Task with a visible error instead of
producing a Task that looks completed while the graph stays empty.
Document the existing-but-undocumented Ollama embedder configuration
in .env.example, CLAUDE.md, README.md, and docker-compose.yml.
mxbai-embed-large is the recommended local model because its 1024-dim
output matches Graphiti's default EMBEDDING_DIM. Adds a curl smoke
test to verify embedder reachability before the first graph build.
No new env var or provider literal: Ollama is reached through the
existing openai-provider branch by setting EMBEDDING_BASE_URL,
EMBEDDING_API_KEY, and EMBEDDING_MODEL.
Closes#18
b8de81a539