fix(rgi): redirect to eTerra when server-side download unavailable

When fileVisibility returns OK → download server-side (fast).
When not available → HTTP 302 redirect to eTerra direct URL.
User's browser session handles authentication automatically.

This means: if logged into eTerra in browser, ALL documents download.
If not logged in, eTerra shows its own login page.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/modules/parcel-sync/services/eterra-client.ts

@@ -217,6 +217,14 @@ export class EterraClient {
     const cookies = await this.jar.getCookies(LOGIN_URL);
     if (!cookies.some((c) => c.key === "JSESSIONID"))
       throw new Error("Login failed / session not set");
+
+    // Activate RGI module context by loading the RGI page
+    // This may set additional session attributes needed for document downloads
+    try {
+      await this.client.get(`${BASE_URL}/`, { timeout: 10_000 });
+    } catch {
+      // Non-critical
+    }
   }
 
   /* ---- High-level parcels --------------------------------------- */