Embedding endpoint (/v1/embeddings) only supports 6 hardcoded cloud
providers. Local inference backends (oMLX, Ollama) serving embeddings
via provider_nodes are inaccessible through OmniRoute.
This adds dynamic provider_node support for embeddings:
- Add EmbeddingProvider interface and buildDynamicEmbeddingProvider()
- Add Phase 2 (provider_nodes prefix match) in parseEmbeddingModel()
- Handler accepts resolvedProvider/resolvedModel from route (injection pattern)
- Handler supports authType=none for local providers (was missing — critical gap)
- Route loads local provider_nodes (localhost only — prevents auth bypass/SSRF)
- Route filters by apiType=chat|responses and localhost hostname
- buildDynamicEmbeddingProvider validates inputs (prefix + baseUrl required)
- Per-node try/catch in map — one bad row doesn't block all providers
- DB errors logged and fall back to hardcoded providers
Regis