feat: add PostgreSQL schema initialization and FreeRADIUS SQL module configuration

sql/init.sql

@@ -86,6 +86,15 @@ CREATE TABLE IF NOT EXISTS nas (
     description VARCHAR(200) DEFAULT 'RADIUS Client'
 );
 
+CREATE TABLE IF NOT EXISTS radpostauth (
+    id BIGSERIAL PRIMARY KEY,
+    username VARCHAR(64) NOT NULL DEFAULT '',
+    pass VARCHAR(64) NOT NULL DEFAULT '',
+    reply VARCHAR(32) NOT NULL DEFAULT '',
+    authdate TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
+);
+CREATE INDEX IF NOT EXISTS radpostauth_username ON radpostauth (username);
+
 -- Application Management Tables
 CREATE TABLE IF NOT EXISTS guest_profiles (
     id SERIAL PRIMARY KEY,