leichte anpassung der .env struktur

math-tutor/backend/.env-example

@@ -11,8 +11,7 @@ ORCHESTRATOR="task" # "tutor", "task" or "qa"
 RETRIEVAL_IMPL="child" # "child" or "subsection"
 LLM_PROVIDER="gwdg" # "openai", "gwdg", "mistral", or "ollama"
 
-EMBEDDING_PROVIDER="gwdg" # "sentence-transformer", "openai", or "gwdg"
-EMBEDDING_TYPE="sentence-transformer" # Legacy/internal fallback: "openai-like" or "sentence-transformer"
+EMBEDDING_PROVIDER="sentence-transformer" # "sentence-transformer", "openai", or "gwdg"
 EMBEDDING_DIM="512"
 
 SENTENCE_TRANSFORMER_MODEL="jinaai/jina-embeddings-v5-text-small-retrieval"
@@ -38,6 +37,5 @@ OLLAMA_TIMEOUT="120"
 
 MISTRAL_CHAT_MODEL="mistral-large-3-675b-instruct-2512"
 MISTRAL_API_KEY=""
-MISTRAL_CHAT_TIMEOUT="60"
 MISTRAL_CHAT_TEMPERATURE="0.2"
 MISTRAL_TIMEOUT="60"