fix(space): respect provider cooldowns and bound TLE groups

server/providers/space/cooldown.js

@@ -0,0 +1,12 @@
+/** Bound an upstream Retry-After delay (seconds or HTTP date). */
+export function providerCooldownMs(response, now = Date.now()) {
+  const raw = response?.headers?.get('retry-after')?.trim();
+  const seconds = raw && /^\d+(?:\.\d+)?$/.test(raw) ? Number(raw) : NaN;
+  const deadline = raw && !Number.isFinite(seconds) ? Date.parse(raw) : NaN;
+  const delay = Number.isFinite(seconds)
+    ? seconds * 1000
+    : Number.isFinite(deadline)
+      ? deadline - now
+      : 60000;
+  return Math.min(30 * 60000, Math.max(5000, delay));
+}