fix(drizzle): register 0004_hot_quicksilver in migration journal

The 0004 migration file shipped in 6a0b36a but _journal.json did not
include its entry, so the hash-based migrate runner saw "0 applied,
4 already applied" on the previous deploy. Append idx 4 so the next
deploy picks it up.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/api/drizzle/meta/_journal.json

@@ -29,6 +29,13 @@
       "when": 1778587000000,
       "tag": "0003_query_log_insights",
       "breakpoints": true
+    },
+    {
+      "idx": 4,
+      "version": "7",
+      "when": 1778709949622,
+      "tag": "0004_hot_quicksilver",
+      "breakpoints": true
     }
   ]
 }