MVP stage 1: extract -> Postgres + atom_versions (web) + Qdrant

.env.stage1

@@ -0,0 +1,9 @@
+# atom-db (Postgres + pgvector)
+POSTGRES_HOST=127.0.0.1
+POSTGRES_PORT=5434
+POSTGRES_USER=atom
+POSTGRES_DB=content_atom
+POSTGRES_PASSWORD=atompass123
+
+# Ollama (bge-m3 embeddings)
+OLLAMA_URL=http://127.0.0.1:11434