aio-interface: fix nginx reverse proxy read timeout blocks AIO from starting consecutive containers (#8016)

* Fix: prevent nginx proxy read timeout from blocking AIO container startup

When AIO runs behind an nginx reverse proxy and a user clicks Start,
image pulls produce no streaming output for minutes at a time. nginx's
proxy_read_timeout fires, drops the upstream connection, and PHP then
aborts on the next write attempt (ignore_user_abort defaults to false),
leaving all containers after the first one never started.

Two fixes:
1. startStreamingResponse(): add ignore_user_abort(true) so PHP never
   terminates if the connection is already gone.
2. PullImage(): stream the Docker NDJSON pull response and write a
   "Pulling image" heartbeat at most once every 5 s, keeping the nginx
   connection alive.  Also surfaces Docker-level stream errors that the
   old buffered call silently ignored, guards against malformed
   newline-free responses with a 1 MB buffer limit, and unifies the
   duplicate catch-block retry logic.

Agent-Logs-Url: https://github.com/nextcloud/all-in-one/sessions/4fd13605-63fb-4693-8a95-89ccec31f7d3

Co-authored-by: szaimen <42591237+szaimen@users.noreply.github.com>

* As heartbeat send a dot regularly

Rather than repeating the message, send a "magic" dot, which gets
appended to the previous line.

Previously the heartbeats weren't sent regulary because reading the data
into a buffer caused a lag.

Signed-off-by: Pablo Zmdl <pablo@nextcloud.com>

* Remove left-over constants

Signed-off-by: Pablo Zmdl <pablo@nextcloud.com>

* Reduce timeout to stay within nginx's default timeout of 5s

Signed-off-by: Pablo Zmdl <pablo@nextcloud.com>

* Fix duplicated library namespace inclusion

Signed-off-by: Pablo Zmdl <pablo@nextcloud.com>

* Deal with preg_replace possibly returning null

Signed-off-by: Pablo Zmdl <pablo@nextcloud.com>

* update the version tag

Signed-off-by: Simon L. <szaimen@e.mail.de>

---------

Signed-off-by: Pablo Zmdl <pablo@nextcloud.com>
Signed-off-by: Simon L. <szaimen@e.mail.de>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: szaimen <42591237+szaimen@users.noreply.github.com>
Co-authored-by: Pablo Zmdl <pablo@nextcloud.com>
Co-authored-by: Simon L. <szaimen@e.mail.de>

php/public/scroll-into-view.js

@@ -4,6 +4,10 @@ const observer = new MutationObserver((records) => {
     // function being present.
     if (node && typeof(node.scrollIntoView) === 'function') {
         node.scrollIntoView();
+        if (node.classList.contains('progress-indicator')) {
+            node.previousSibling.append('.');
+            node.remove();
+        }
     }
 });
 observer.observe(document, {childList: true, subtree: true});