Finalize Unified Type Migration and scaffold core logistics logic

- Completed the unified type system in ae_types.ts covering all 42 active Aether objects.
- Scaffolded missing core logic modules for Organization, EventTrack, and Sponsorship with standardized return types.
- Updated project roadmap in TODO.md to reflect mission completion on foundational type parity.

src/lib/ae_events/ae_events__event_track.ts

@@ -0,0 +1,24 @@
+import { api } from '$lib/api/api';
+import type { ae_EventTrack } from '$lib/types/ae_types';
+
+/**
+ * EventTrack module logic
+ */
+
+export async function load_ae_obj_li__event_track({
+    api_cfg,
+    event_id,
+    log_lvl = 0
+}: {
+    api_cfg: any;
+    event_id: string;
+    log_lvl?: number;
+}): Promise<ae_EventTrack[]> {
+    return await api.get_ae_obj_li_v3({
+        api_cfg,
+        obj_type: 'event_track',
+        for_obj_type: 'event',
+        for_obj_id: event_id,
+        log_lvl
+    });
+}