Respect SpaceDevs request limits and cooldowns

update.py

@@ -342,10 +342,6 @@ def update_thespacedevs(config: flask.config.Config) -> None:
     if agenda.thespacedevs.is_launches_cache_fresh(rocket_dir):
         return
 
-    # Update active crewed mission cache used by the launches page.
-    # Uses the 2-hour TTL; failures are handled internally with cache fallback.
-    active_crewed = agenda.thespacedevs.get_active_crewed_flights(rocket_dir)
-
     # Always follow configured slugs
     follow_slugs: set[str] = set(config["FOLLOW_LAUNCHES"])
 
@@ -357,7 +353,10 @@ def update_thespacedevs(config: flask.config.Config) -> None:
     }
 
     t0 = time()
-    data = agenda.thespacedevs.next_launch_api_data(rocket_dir)
+    try:
+        data = agenda.thespacedevs.next_launch_api_data(rocket_dir)
+    except agenda.thespacedevs.RateLimitDeferred:
+        return
     if not data:
         send_thespacedevs_payload_alert(
             config,
@@ -375,6 +374,9 @@ def update_thespacedevs(config: flask.config.Config) -> None:
         )
         return
 
+    # Fetch upcoming launches first so historical pagination cannot starve them.
+    active_crewed = agenda.thespacedevs.get_active_crewed_flights(rocket_dir)
+
     # Identify test-flight slugs present in the current data
     cur_test_slugs: set[str] = {
         typing.cast(str, item["slug"])