Implemented schema/main.yml und config/main.yml file

roles/web-app-mailu/schema/main.yml

@@ -0,0 +1,25 @@
+credentials:
+  secret_key:
+    description: "Secret key for cryptographic operations in Mailu (must be a 16-byte random string, hex-encoded)"
+    algorithm: "sha256"
+    validation: "^[a-f0-9]{32}$"
+
+  database_password:
+    description: "Password for the Mailu PostgreSQL or MariaDB database user"
+    algorithm: "bcrypt"
+    validation: "^\\$2[aby]\\$.{56}$"
+
+  api_token:
+    description: "Authentication token for accessing the Mailu RESTful API (minimum 3 characters)"
+    algorithm: "plain"
+    validation: "^.{3,}$"
+
+  initial_administrator_password:
+    description: "Initial password for the Mailu administrator account (used during setup)"
+    algorithm: "sha256"
+    validation: "^[a-f0-9]{64}$"
+
+  dkim_public_key:
+    description: "Public DKIM key for DNS configuration (TXT record)"
+    algorithm: "plain"
+    validation: "^.{64,}$"