feat(db): add nav_links, social_links, and events tables

- Add nav_links table with siteId, label, url, position, sortOrder, isExternal
- Add social_links table with siteId, platform, label, url, icon, sortOrder
- Add events table with siteId, title, description, eventType, startTime, endTime, timezone, location, externalLink, imageCdnKey, isPublished, isRecurring
- Include corresponding Drizzle migration entries

drizzle/meta/_journal.json

@@ -8,6 +8,20 @@
       "when": 1780717416486,
       "tag": "0000_moaning_the_initiative",
       "breakpoints": true
+    },
+    {
+      "idx": 1,
+      "version": "7",
+      "when": 1780726060837,
+      "tag": "0001_huge_arachne",
+      "breakpoints": true
+    },
+    {
+      "idx": 2,
+      "version": "7",
+      "when": 1780726716892,
+      "tag": "0002_brief_proemial_gods",
+      "breakpoints": true
     }
   ]
 }