fix: remove internal implementation details (Borg, lz4) from blog post and homepage

blog/posts/why-backing-up-an-agent-is-so-hard.html

@@ -245,12 +245,12 @@
         <h2>How Full-Disk Snapshots Solve It</h2>
 
         <p>
-            The only way to guarantee an agent restores to a <strong>working state</strong> is to back up its <em>entire filesystem</em> — not just the home directory, and not just config files. Here's how deduplicated snapshot tools like Borg solve the practical concerns:
+            The only way to guarantee an agent restores to a <strong>working state</strong> is to back up its <em>entire filesystem</em> — not just the home directory, and not just config files. Here's how it works:
         </p>
 
-        <h3>1. Size isn't a problem — deduplication makes it efficient</h3>
+        <h3>1. Size isn't a problem — efficient snapshot compression</h3>
         <p>
-            Our 6.8 GB agent compresses and deduplicates down to roughly 1–2 GB for daily snapshots. Borg breaks the filesystem into chunks and only stores what changed — so a daily backup after the initial snapshot is often just <strong>50–200 MB</strong> of deltas.
+            Our 6.8 GB agent compresses down to roughly 1–2 GB for daily snapshots. Only what changed between snapshots is stored — so a daily backup after the initial snapshot is often just <strong>50–200 MB</strong> of deltas.
         </p>
 
         <h3>2. Full-disk means full recovery</h3>
@@ -260,7 +260,7 @@
 
         <h3>3. Compression reduces storage cost</h3>
         <p>
-            Borg's lz4 compression reduces the 6.8 GB to about 4.2 GB on disk. With 7 daily snapshots retaining the full machine state, you're looking at ~6–10 GB total — negligible for any modern VPS provider at ~$0.02/GB/month.
+            Our snapshot compression brings the 6.8 GB down to about 4.2 GB on disk. With 7 daily snapshots retaining the full machine state, you're looking at ~6–10 GB total — negligible for any modern VPS provider.
         </p>
 
         <h2>What Derez.ai Does Differently</h2>

index.html

@@ -1256,7 +1256,7 @@
                             anytime from the dashboard with one click, perfect
                             for when you have an agent status that works
                             perfectly. Backups are kept for 7 days (daily) and 8
-                            weeks (weekly) using Borg's prune retention policy,
+                            weeks (weekly),
                             so older snapshots are automatically cleaned up.
                         </div>
                     </div>