feat: Minstrel no longer talks to Lidarr: its connection, Delete via Lidarr and the unmonitor options are gone, and the track reports are plain quarantine (M502 #5525)

Migration 0091 drops lidarr_config and renames the quarantine tables, types,
indexes and the history column off the Lidarr name. The Integrations Lidarr
card, the Reports "Delete via Lidarr" action, the merge and remove-track
unmonitor options, the Lidarr audit actions and error codes go, on the
server, web and Android. The README describes acquisition as it is now.

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

internal/api/reset_test.go

@@ -0,0 +1,14 @@
+package api
+
+import (
+	"context"
+	"testing"
+)
+
+// resetRequests clears requests rows between tests.
+func resetRequests(t *testing.T, h *handlers) {
+	t.Helper()
+	if _, err := h.pool.Exec(context.Background(), "DELETE FROM requests"); err != nil {
+		t.Fatalf("resetRequests: %v", err)
+	}
+}