docs: update presentation slides

slides/slides.js

@@ -55,18 +55,7 @@ const slides = [
     ]
   },
   {
-    eyebrow: '06 / Safe Claim',
-    title: 'PostgreSQL Chooses the Winner',
-    subtitle: 'Atomic claim uses row locks and SKIP LOCKED to avoid double execution.',
-    image: 'images/06-claim.png',
-    notes: [
-      'The worker selects the next eligible queued job ordered by priority, available_at, created_at, and id.',
-      'Inside one transaction, it uses <code>SELECT ... FOR UPDATE SKIP LOCKED</code>, then marks the row running, increments attempts, and sets the lease.',
-      'When many threads race, one locks the row; the others skip it instead of waiting and accidentally claiming the same job.'
-    ]
-  },
-  {
-    eyebrow: '07 / State',
+    eyebrow: '06 / State',
     title: 'Status Transitions Are Explicit',
     subtitle: 'The queue allows only meaningful movement between queued, running, succeeded, and failed.',
     image: 'images/07-state.png',
@@ -76,6 +65,17 @@ const slides = [
       'When attempts are exhausted, the job becomes failed. Manual retry can move failed back to queued and resets the attempt count.'
     ]
   },
+  {
+    eyebrow: '07 / Safe Claim',
+    title: 'PostgreSQL Chooses the Winner',
+    subtitle: 'Atomic claim uses row locks and SKIP LOCKED to avoid double execution.',
+    image: 'images/06-claim.png',
+    notes: [
+      'The worker selects the next eligible queued job ordered by priority, available_at, created_at, and id.',
+      'Inside one transaction, it uses <code>SELECT ... FOR UPDATE SKIP LOCKED</code>, then marks the row running, increments attempts, and sets the lease.',
+      'When many threads race, one locks the row; the others skip it instead of waiting and accidentally claiming the same job.'
+    ]
+  },
   {
     eyebrow: '08 / Ownership',
     title: 'Current Owner + Attempt Is the Write Token',