feat(staging): inbound links so /odoo-staging-environment/ is not an orphan

The copy's 'Into this page' table, applied as single additive sentences:
- support.html: the 'error 500 after a git check in' FAQ answer links
  'test it safely first'.
- blog/posts/speed-run-backup.html: end of the post links
  'what a staging environment is, and why you probably do not need one'.
- odoo-hosting-2027.html: one contextual note by the backup/module rows
  links 'do you need a staging environment?'.
- index.html: one FAQ card 'Do you need an Odoo staging environment?'.
No footer change. No new impeccable finding category.

blog/posts/speed-run-backup.html

@@ -237,6 +237,11 @@ Odoo &gt; Settings &gt; Technical &gt; Scheduled Actions &gt; backup job</code><
                             >Choose a Plan</a
                         >
                     </div>
+                    <p>
+                        A backup is the safety net for a single change. When the change is bigger than one
+                        module, a version upgrade or a migration, a staging environment is worth it. Read
+                        <a href="../../odoo-staging-environment/">what a staging environment is, and why you probably do not need one</a>.
+                    </p>
                 </div>
             </article>
             <div class="post-footer">

index.html

@@ -382,6 +382,10 @@
             <div class="faq-q"><span>ODOO Community? What can it do?</span> <i class="fas fa-chevron-down"></i></div>
             <div class="faq-a"><p>Inventory, accounting, CRM, sales, manufacturing, HR — all in one system. Free and fully open-source. <a href="what-can-i-use-odoo-for/">What you can use Odoo for, in plain English</a>.</p></div>
           </div>
+          <div class="faq-card plausible-event-name=FAQ" onclick="this.classList.toggle('open')">
+            <div class="faq-q"><span>Do you need an Odoo staging environment?</span> <i class="fas fa-chevron-down"></i></div>
+            <div class="faq-a"><p>Most small businesses do not. If you change Odoo's code you do; if you install a finished module, a backup and a careful test is enough. <a href="odoo-staging-environment/">Do you need an Odoo staging environment?</a></p></div>
+          </div>
           <div class="faq-card plausible-event-name=FAQ" onclick="this.classList.toggle('open')">
             <div class="faq-q"><span>Do you have an affiliate program?</span> <i class="fas fa-chevron-down"></i></div>
             <div class="faq-a"><p>No. We believe it is in our best interest to have competitive prices for our shared clients.</p></div>

odoo-hosting-2027.html

@@ -754,6 +754,15 @@
               panel. It is optional. The business works exactly the same without it.
             </p>
           </div>
+          <div class="cmp-note">
+            <h3>Do you need staging?</h3>
+            <p>
+              A staging environment is a second copy of your system you are allowed to break. It is the right
+              tool when you change Odoo's code, and overkill when you install a finished module on a backup.
+              We wrote out <a href="/odoo-staging-environment/">do you need a staging environment?</a>, and the
+              simpler route we recommend first.
+            </p>
+          </div>
         </div>
       </div>
     </section>

support.html

@@ -439,6 +439,7 @@
                         </button>
                         <div class="faq-answer">
                             <p>If you've pushed a new module to the server and it prevents the service from starting, first revert your changes in Git and push the corrected version back to the server. Then open the support chat — you'll need your UUID (sent in the confirmation email). After you tell our chatbot to git pull and restart the server, you'll receive a confirmation email; once confirmed, we'll bring your Odoo instance back online.</p>
+                            <p>Before you check in a change like this, read <a href="/odoo-staging-environment/">test it safely first</a>: a staging environment is what stops a bad check-in taking your server down, and most small businesses do not need one.</p>
                         </div>
                     </div>
                     <div class="faq-item">