feat(notifications): Refactor notification system and consolidate interaction handlers

- Remove dedicated bot owner notification utility in favor of unified notification system
- Update all interaction endpoints (follow, like, mention, repost) to use consolidated notification flow
- Refactor notification route to handle all interaction types through single endpoint
- Update posts endpoints to trigger notifications through unified system
- Add database migration snapshot for notification schema changes
- Simplify notification logic by removing redundant bot owner notification module
- Improve notification consistency across all user interactions and post operations

drizzle/meta/_journal.json

@@ -43,6 +43,13 @@
       "when": 1769422771465,
       "tag": "0005_yummy_millenium_guard",
       "breakpoints": true
+    },
+    {
+      "idx": 6,
+      "version": "7",
+      "when": 1769427398729,
+      "tag": "0006_loud_moonstone",
+      "breakpoints": true
     }
   ]
 }