Merge branch 'feature/iam-07-account-lockout-login-rate-limiting' into feature/qa-02-pruefgate-identitaet-mandanten

# Conflicts:
#	scripts/reset-test-env.sh
#	scripts/run-checks.sh

migrations/tenant/0003_login_attempts.down.sql

@@ -0,0 +1 @@
+DROP TABLE IF EXISTS login_attempts;

migrations/tenant/0003_login_attempts.up.sql

@@ -0,0 +1,10 @@
+-- Account-Lockout & Login-Rate-Limiting (IAM-07, siehe
+-- core-kanban/tickets/IAM-07.md). Geteilter, externer Zustand in Postgres —
+-- kein In-Process-Zaehler (bekannter Fehler aus archivdms
+-- internal/auth/ratelimit.go), gilt korrekt ueber mehrere Core-Instanzen.
+CREATE TABLE login_attempts (
+    email           TEXT PRIMARY KEY,
+    failed_count    INT NOT NULL DEFAULT 0,
+    locked_until    TIMESTAMPTZ,
+    last_attempt_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);