feat(registration): add watcher capacity limits and update pricing

Add 70-person capacity limit for watchers with real-time availability checks.
Update drink card pricing to €5 per person (was €5 base + €2 per guest).
Add feature flag to bypass registration countdown.
Show under-review notice for performer registrations.
Update FAQ performance duration from 5-7 to 5 minutes.

apps/web/src/components/registration/PerformerForm.tsx

@@ -441,6 +441,33 @@ export function PerformerForm({ onBack, onSuccess }: Props) {
 					<GiftSelector value={giftAmount} onChange={setGiftAmount} />
 				</div>
 
+				{/* Under review notice */}
+				<div className="flex items-start gap-3 rounded-lg border border-amber-400/30 bg-amber-400/10 p-4">
+					<svg
+						className="mt-0.5 h-5 w-5 shrink-0 text-amber-300"
+						fill="none"
+						viewBox="0 0 24 24"
+						stroke="currentColor"
+						strokeWidth={1.5}
+						aria-hidden="true"
+					>
+						<path
+							strokeLinecap="round"
+							strokeLinejoin="round"
+							d="M12 9v3.75m-9.303 3.376c-.866 1.5.217 3.374 1.948 3.374h14.71c1.73 0 2.813-1.874 1.948-3.374L13.949 3.378c-.866-1.5-3.032-1.5-3.898 0L2.697 16.126zM12 15.75h.007v.008H12v-.008z"
+						/>
+					</svg>
+					<div>
+						<p className="font-semibold text-amber-300 text-sm">
+							Jouw inschrijving staat onder voorbehoud
+						</p>
+						<p className="mt-1 text-sm text-white/70">
+							Na het indienen wordt je aanvraag beoordeeld. Je ontvangt een
+							bevestiging of je effectief uitgenodigd wordt om op te treden.
+						</p>
+					</div>
+				</div>
+
 				<div className="flex flex-col items-center gap-4 pt-4">
 					<button
 						type="submit"