Align prod schema and deploy tooling

terraform/modules/supabase/variables.tf

@@ -0,0 +1,10 @@
+variable "project_ref" {
+  description = "Supabase project reference ID"
+  type        = string
+}
+
+variable "is_production" {
+  description = "Whether this is the production environment (enables SMTP, higher rate limits)"
+  type        = bool
+  default     = false
+}