chore(config): document auth signing key and ignore surreal history

.env.example

@@ -5,6 +5,12 @@
 ASPNETCORE_ENVIRONMENT=Production
 ASPNETCORE_URLS=http://+:8080
 
+# Auth — JWT signing key (min. 32 chars). REQUIRED in Production; never commit a real value.
+# Auth__SigningKey=
+# Auth__Issuer=tarninahub
+# Auth__Audience=tarninahub
+# Auth__TokenLifetimeMinutes=60
+
 # SurrealDB — embedded RocksDB by default.
 SurrealDb__Namespace=hubmi
 SurrealDb__Database=hubmi

.gitignore

@@ -35,3 +35,6 @@ backend/local-docs/
 # Docker — lokalne nadpisania
 docker-compose.override.yaml
 docker-compose.override.yml
+
+# Artefakty narzędzi (np. historia REPL `surreal sql`)
+history.txt