Default the Oracle embedders' proxy argument to None

[RichmondAlake]

What

OracleTextEmbedder and OracleDocumentEmbedder declare proxy: Any | None as a required keyword-only argument, despite documenting it as "Optional HTTP proxy…". Constructing either embedder the normal way:

OracleDocumentEmbedder(connection_params=..., embedding_params=...)

raises:

TypeError: OracleDocumentEmbedder.__init__() missing 1 required keyword-only argument: 'proxy'

This bites any standard usage / RAG pipeline. The existing tests don't catch it because they always pass proxy explicitly.

Fix

Default proxy to None in both embedder constructors (one word each). proxy is keyword-only, so this is fully backward compatible.

Verification

Against Oracle AI Database 26ai Free with the in-DB ALL_MINILM_L12_V2 model:

• Both embedders now construct without proxy; live embedding returns 384-dim vectors.
• Unit suite: 182 passed (no regression).
• A full RAG pipeline (OracleDocumentEmbedder → OracleDocumentStore → OracleEmbeddingRetriever → OpenAIGenerator) runs without the proxy=None workaround.

🤖 Generated with Claude Code