fix: resolve 4 bugs from QA round 6 (BUG-F/G/H/I)

BUG-F (P1): Fake webhook lookupInbox used JSONB @> operator on a TEXT
column, causing all fake webhooks to return "ignored". Cast
channel_config::jsonb before the @> operator.

BUG-G (P3): Vue Router history.state warning on Activity page. Four
call sites replaced history.state with null/{}, destroying Vue Router's
internal navigation state. Now all replaceState calls preserve
window.history.state.

BUG-H (P3): Inbox list showed stale data because cache_keys endpoint
returned hardcoded "0000000000" for inbox/label/team, so the frontend
IndexedDB cache never invalidated. Cache keys are now derived from
actual DB state (row count + MAX(updated_at)), with defensive fallback
for missing tables.

BUG-I (P3): All worker goroutines shared the same Redis consumer name,
so XINFO CONSUMERS showed 1 consumer instead of N. Each goroutine now
generates a unique consumer ID (workerID-index).

frontend/app/javascript/portal/portalThemeHelper.js

@@ -33,7 +33,8 @@ export const removeQueryParamsFromUrl = (queryParam = 'theme') => {
 
   if (param) {
     url.searchParams.delete(queryParam);
-    window.history.replaceState({}, '', url.toString()); // Convert URL to string
+    // Preserve history.state so Vue Router's internal state is not lost.
+    window.history.replaceState(window.history.state, '', url.toString());
   }
 };