feat(sync): implement dedicated presentation and presenter refresh loops

- Added background API refresh loops for room-level presentation and presenter metadata.\n- Updated Sync Monitor UI to display all six loop intervals.\n- Added UI controls in Launcher Config for fine-tuning polling periods.\n- Staggered initial background fetches to prevent API connection flooding.\n- Corrected timer assignments to separate structural metadata from room content.

src/routes/events/[event_id]/(launcher)/launcher_background_sync.svelte

@@ -449,6 +449,18 @@
                     >
                     <span>{loop_info.session / 1000}s</span>
                 </div>
+                <div class="flex justify-between items-center">
+                    <span class:text-primary-500={timer__presentation}
+                        >Pres Loop:</span
+                    >
+                    <span>{loop_info.presentation / 1000}s</span>
+                </div>
+                <div class="flex justify-between items-center">
+                    <span class:text-primary-500={timer__presenter}
+                        >Speaker Loop:</span
+                    >
+                    <span>{loop_info.presenter / 1000}s</span>
+                </div>
             </div>
         </div>
     {/if}