fix(ombi): resolve TV request status, user, and date display (Issue #53)

Ombi's TV API nests all request data (requestedUser, approved, available,
denied, requested, requestedDate) inside childRequests[] sub-objects.
The application previously only inspected top-level properties, causing
TV shows to consistently display 'unknown' status, 'unknown' user, and
no request date.

Changes:
- OmbiRetriever._hydrateRequest(): hydrate requestedUser on each
  childRequests entry and promote requestedDate to top level
- getRequestStatus() (server + client): aggregate status flags from
  childRequests[] when top-level properties are absent
- Client date display: fallback to childRequests[0].requestedDate
- Add 18 unit tests covering childRequests hydration, status
  aggregation, and date promotion

Closes #53

server/utils/ombiFilters.js

@@ -17,6 +17,23 @@ function getRequestStatus(request) {
   if (request.denied) return 'denied';
   if (request.approved) return 'approved';
   if (request.requested) return 'pending';
+
+  // Ombi TV requests store status flags inside childRequests
+  if (Array.isArray(request.childRequests) && request.childRequests.length > 0) {
+    for (const child of request.childRequests) {
+      if (child && child.available) return 'available';
+    }
+    for (const child of request.childRequests) {
+      if (child && child.denied) return 'denied';
+    }
+    for (const child of request.childRequests) {
+      if (child && child.approved) return 'approved';
+    }
+    for (const child of request.childRequests) {
+      if (child && child.requested) return 'pending';
+    }
+  }
+
   return 'unknown';
 }