Enforce deployment security boundaries

src/govoplan_core/settings.py

@@ -47,6 +47,27 @@ class Settings(BaseSettings):
     auth_cookie_samesite: str = Field(default="lax", alias="AUTH_COOKIE_SAMESITE")
     auth_cookie_domain: str | None = Field(default=None, alias="AUTH_COOKIE_DOMAIN")
     auth_session_hours: int = Field(default=12, alias="AUTH_SESSION_HOURS")
+    auth_login_throttle_enabled: bool = Field(default=True, alias="AUTH_LOGIN_THROTTLE_ENABLED")
+    auth_login_throttle_identity_limit: int = Field(
+        default=10,
+        ge=1,
+        alias="AUTH_LOGIN_THROTTLE_IDENTITY_LIMIT",
+    )
+    auth_login_throttle_client_limit: int = Field(
+        default=100,
+        ge=1,
+        alias="AUTH_LOGIN_THROTTLE_CLIENT_LIMIT",
+    )
+    auth_login_throttle_window_seconds: int = Field(
+        default=15 * 60,
+        ge=1,
+        alias="AUTH_LOGIN_THROTTLE_WINDOW_SECONDS",
+    )
+    auth_login_throttle_redis_retry_seconds: int = Field(
+        default=30,
+        ge=1,
+        alias="AUTH_LOGIN_THROTTLE_REDIS_RETRY_SECONDS",
+    )
 
     master_key_b64: str | None = Field(default=None, alias="MASTER_KEY_B64")
     celery_queues: str = Field(default="send_email,append_sent,notifications,calendar,default", alias="CELERY_QUEUES")