fix(server): harden self-hosted server — pgvector upgrade, admin auth, endpoint security (#5360)

server/.env.example

@@ -4,12 +4,13 @@ OPENAI_API_KEY=
 # ANTHROPIC_API_KEY=
 # GOOGLE_API_KEY=
 
-POSTGRES_HOST=
-POSTGRES_PORT=
-POSTGRES_DB=
-POSTGRES_USER=
+# Postgres — POSTGRES_PASSWORD is required; docker-compose will not start without it.
+POSTGRES_HOST=postgres
+POSTGRES_PORT=5432
+POSTGRES_DB=postgres
+POSTGRES_USER=postgres
 POSTGRES_PASSWORD=
-POSTGRES_COLLECTION_NAME=
+POSTGRES_COLLECTION_NAME=memories
 
 ADMIN_API_KEY=
 JWT_SECRET=