feat: per-source pause/stop controls for queue admin

Add operator pause/resume/stop/start for individual adapter sources,
persisted in queue_state. Pause freezes draining and retains jobs; stop
clears pending/backoff jobs and blocks re-enqueue until start. Wires admin
tRPC endpoints plus a clean two-row Actions layout in the queue admin page.

app/package-lock.json

@@ -1,11 +1,11 @@
 {
-  "name": "trader-dashboard",
+  "name": "investor-flow",
   "version": "0.1.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
-      "name": "trader-dashboard",
+      "name": "investor-flow",
       "version": "0.1.0",
       "dependencies": {
         "@radix-ui/react-dialog": "^1.1.17",