feat: add configurable timeout for public database TCP proxy

Adds a per-database 'Proxy Timeout' setting for publicly exposed databases.
The nginx stream proxy_timeout can now be configured in the UI, defaulting
to 3600s (1 hour) instead of nginx's 10min default. Set to 0 for no timeout.

Fixes #7743

resources/views/livewire/project/database/postgresql/general.blade.php

@@ -165,6 +165,8 @@
                     </div>
                     <x-forms.input placeholder="5432" disabled="{{ $isPublic }}" id="publicPort"
                         label="Public Port" canGate="update" :canResource="$database" />
+                    <x-forms.input placeholder="3600" disabled="{{ !$isPublic }}" id="publicPortTimeout"
+                        label="Proxy Timeout (seconds)" helper="Timeout for the public TCP proxy connection in seconds. Set to 0 for no timeout. Default: 3600 (1 hour)." canGate="update" :canResource="$database" />
                 </div>
 
                 <div class="flex flex-col gap-2">