Anpassung Noise-Canceling new_source_ip_for_user

deploy/mariadb/init/001-schema.sql

@@ -1800,4 +1800,14 @@ VALUES
 ('administrator', 'Built-in Administrator', 1),
 ('admin', 'Generic admin account', 1)
 ON DUPLICATE KEY UPDATE
-reason = VALUES(reason);
+reason = VALUES(reason);
+
+CREATE TABLE IF NOT EXISTS user_source_ip_seen (
+    username VARCHAR(255) NOT NULL,
+    src_ip VARCHAR(64) NOT NULL,
+    hostname VARCHAR(255) NOT NULL,
+    first_seen DATETIME(6) NOT NULL,
+    last_seen DATETIME(6) NOT NULL,
+    seen_count BIGINT NOT NULL DEFAULT 1,
+    PRIMARY KEY (username, src_ip, hostname)
+);