✨ Enhance module documentation with detailed descriptions for DNS, Foundry, Pangolin, and Public IP modules

modules/pip/main.tf

@@ -1,3 +1,10 @@
+/**
+ * # Public IP Module
+ *
+ * Discovers the caller's public IPv4 address using an external echo-IP service.
+ * Used to dynamically allowlist the deployer's IP in firewall rules.
+ */
+
 terraform {
   required_providers {
      http = { }