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_sponsorships/ae_sponsorships__sponsorship.ts

@@ -0,0 +1,42 @@
+import { api } from '$lib/api/api';
+import type { ae_Sponsorship } from '$lib/types/ae_types';
+import type { key_val } from '$lib/stores/ae_stores';
+
+/**
+ * Sponsorship module logic
+ */
+
+export async function load_ae_obj_id__sponsorship({
+    api_cfg,
+    sponsorship_id,
+    log_lvl = 0
+}: {
+    api_cfg: any;
+    sponsorship_id: string;
+    log_lvl?: number;
+}): Promise<ae_Sponsorship | null> {
+    return await api.get_ae_obj_v3({
+        api_cfg,
+        obj_type: 'sponsorship',
+        obj_id: sponsorship_id,
+        log_lvl
+    });
+}
+
+export async function load_ae_obj_li__sponsorship({
+    api_cfg,
+    for_obj_id,
+    log_lvl = 0
+}: {
+    api_cfg: any;
+    for_obj_id: string;
+    log_lvl?: number;
+}): Promise<ae_Sponsorship[]> {
+    return await api.get_ae_obj_li_v3({
+        api_cfg,
+        obj_type: 'sponsorship',
+        for_obj_type: 'account',
+        for_obj_id,
+        log_lvl
+    });
+}