mobile: fix flex-row text overflow; parallelize door-ingest poll; docs refresh

Mobile responsiveness: several flex rows had a `truncate` child without
`min-w-0`, so a long value (member/door name, channel name, published form
URL) would not shrink and pushed the row past the viewport on a phone. Added
`min-w-0` (with `flex-1`/`shrink-0` where needed) on the dashboard presence +
door-self-entry rows, the comms channel list, and the form-builder URL.

Door inbound poll: `/api/cron/door-ingest` now polls connections with
Promise.allSettled instead of a sequential loop, so one tick is bounded to the
slowest single poll rather than the sum of all per-call timeouts; each
connection stays isolated and the run is idempotent.

Docs: refreshed ARCHITECTURE (door epic marked complete P1-P5), the README
access-control feature bullet + project-status pointer, a historical banner on
the older AUDIT.md, a door-epic CHANGELOG entry, and the rolling HANDOFF audit
log (passes 65-68). No migration; no behavior change for existing users.

app/(app)/comms/comms-client.tsx

@@ -215,7 +215,7 @@ export default function CommsClient({ member, space, channels }: Props) {
                     }`}
                   >
                     <Hash className="w-3.5 h-3.5 flex-shrink-0" />
-                    <span className="truncate">{channel.name}</span>
+                    <span className="truncate min-w-0">{channel.name}</span>
                     {channel.unread_count > 0 && (
                       <span className="ml-auto w-4 h-4 bg-primary text-white text-[9px] font-bold rounded-full flex items-center justify-center">
                         {channel.unread_count}
@@ -240,7 +240,7 @@ export default function CommsClient({ member, space, channels }: Props) {
                     }`}
                   >
                     <Hash className="w-3.5 h-3.5 flex-shrink-0" />
-                    <span className="truncate">{channel.name}</span>
+                    <span className="truncate min-w-0">{channel.name}</span>
                   </button>
                 ))}
               </div>
@@ -262,7 +262,7 @@ export default function CommsClient({ member, space, channels }: Props) {
                     <svg className="w-3.5 h-3.5 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                       <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M3 7v10a2 2 0 002 2h14a2 2 0 002-2V9a2 2 0 00-2-2h-6l-2-2H5a2 2 0 00-2 2z" />
                     </svg>
-                    <span className="truncate">{channel.name}</span>
+                    <span className="truncate min-w-0">{channel.name}</span>
                   </button>
                 ))}
               </div>