Implemented Aether API V3 Lookup integration for standardized tables.

- Created 'src/lib/ae_api/api_get__lookup_v3.ts' to handle the new '/v3/lookup/{lu_type}/list' endpoint.
- Refactored 'get_ae_obj_li_for_lu' in 'api.ts' to prioritize the V3 system for countries, subdivisions, and time zones, with V2 fallback for legacy types.
- Ensured lookups use the 'x-no-account-id' bypass for unauthenticated site bootstrapping.
- Updated core country, subdivision, and time zone loaders to use the refined API interface.

src/lib/ae_api/api_get__lookup_v3.ts

@@ -0,0 +1,56 @@
+import { get_object } from './api_get_object';
+import type { key_val } from '$lib/stores/ae_stores';
+
+/**
+ * Get a list of lookup objects (V3)
+ * Standardized lookup data like countries, timezones, and subdivisions.
+ * Updated 2026-02-20
+ * 
+ * Endpoint: GET /v3/lookup/{lu_type}/list
+ */
+export async function get_ae_lookup_li_v3({
+    api_cfg,
+    lu_type,
+    site_id,
+    for_type,
+    for_id,
+    include_disabled = false,
+    params = {},
+    headers = {},
+    log_lvl = 0
+}: {
+    api_cfg: any;
+    lu_type: 'country' | 'country_subdivision' | 'time_zone' | string;
+    site_id?: string;
+    for_type?: string;
+    for_id?: string;
+    include_disabled?: boolean;
+    params?: key_val;
+    headers?: Record<string, string>;
+    log_lvl?: number;
+}) {
+    if (log_lvl) {
+        console.log(`*** get_ae_lookup_li_v3() *** lu_type=${lu_type}`);
+    }
+
+    const endpoint = `/v3/lookup/${lu_type}/list`;
+    
+    // Build query params
+    if (site_id) params['site_id'] = site_id;
+    if (for_type) params['for_type'] = for_type;
+    if (for_id) params['for_id'] = for_id;
+    if (include_disabled) params['include_disabled'] = true;
+
+    // Lookup data is often global; ensure account context is handled if needed, 
+    // but GUIDE says it uses site Whitelist Policy.
+    // If no account_id is present in api_cfg, we might need 'x-no-account-id' 
+    // for some lookups if they are public.
+    
+    return await get_object({
+        api_cfg,
+        endpoint,
+        params,
+        headers,
+        log_lvl
+    });
+}