fix: CHROMA_PERSIST_DIR=/data/chroma (was writing to /app/data/chroma temp layer)

Dockerfile

@@ -14,6 +14,9 @@ ENV PYTHONUNBUFFERED=1 \
     PIP_NO_CACHE_DIR=1 \
     PIP_DISABLE_PIP_VERSION_CHECK=1 \
     DATA_DIR=/data \
+    CHROMA_PERSIST_DIR=/data/chroma \
+    UPLOAD_DIR=/data/uploads \
+    SQLITE_DIR=/data/sqlite \
     HF_HOME=/data/.cache/huggingface \
     TRANSFORMERS_CACHE=/data/.cache/huggingface \
     TOKENIZERS_PARALLELISM=false