feat(launcher): implement force-sync and chronological download priority

Onsite operators can now manually trigger a full pre-sync of all location
materials via a "Force Sync Location" button in the Launcher config.
This ensures podium Macs have all content cached before an event starts.

- Added trigger__force_location_sync to launcher session store.
- Implemented force_location_sync() in background sync engine to perform
  recursive metadata fetches for all sessions in a location.
- Optimized download queue with a 4-tier chronological sort:
  1. Event/Location assets (Global)
  2. Sessions by start time (Earliest first)
  3. Presentations by start time (Sequential order)
  4. File creation date (First-in fairness for on-time uploads)
- Updated module and native integration documentation.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/stores/ae_events_stores__launcher_defaults.ts

@@ -119,6 +119,9 @@ export interface LauncherSessState {
     trigger_reload__event_session_obj_li: string | null;
     trigger_reload__event_location_obj_id: string | null;
     trigger_reload__event_location_obj_li: string | null;
+
+    trigger__force_location_sync: any;
+
     trigger__ws_connect: any;
     trigger__ws_disconnect: any;
 }
@@ -254,6 +257,8 @@ export const launcher_sess_defaults: LauncherSessState = {
     trigger_reload__event_location_obj_id: null,
     trigger_reload__event_location_obj_li: null,
 
+    trigger__force_location_sync: null,
+
     trigger__ws_connect: null,
     trigger__ws_disconnect: null
 };