Ban lists: where Guard and fail2ban ban addresses

A program bans an address (every port, or a protocol's ports) for a
time; the ban list says what it is kept from: the firewall, some hosts
behind it, or everything. Bans drop ahead of every rule, close the
address's connections, group IPv6 by /64, are kept in the database
across restarts and audited. Never banned: the inside, the firewall's
own addresses, the caller, the list's never. bans grant (bans:write:LIST),
hc banlist/bans/ban/unban, Traffic -> Bans, a fail2ban action in contrib/,
and failed logins and refused tokens logged for Guard and fail2ban.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/store/store.go

@@ -179,6 +179,23 @@ CREATE TABLE changesets (
 	history_id INTEGER
 );
 CREATE INDEX changesets_status ON changesets (status);
+`,
+	// 3: ban lists' bans (the lists are objects)
+	`
+CREATE TABLE bans (
+	id INTEGER PRIMARY KEY AUTOINCREMENT,
+	list_id INTEGER NOT NULL,
+	address TEXT NOT NULL,
+	protocol TEXT NOT NULL DEFAULT '',
+	port INTEGER NOT NULL DEFAULT 0,
+	expires_at TEXT,
+	created_at TEXT NOT NULL,
+	who TEXT NOT NULL DEFAULT '',
+	source TEXT NOT NULL DEFAULT '',
+	reason TEXT NOT NULL DEFAULT '',
+	UNIQUE (list_id, address, protocol, port)
+);
+CREATE INDEX bans_expires ON bans (expires_at);
 `,
 }