feat: turn session recording into a plugin (B13)

drizzle/postgres/0042_strange_shocker.sql

@@ -0,0 +1,5 @@
+-- session_recordings moved to the session-recording plugin, whose first
+-- migration renames it. Dropping it here would lose every recording, so
+-- this only stops drizzle tracking it. SELECT 1 because MySQL rejects an
+-- empty query.
+SELECT 1;

drizzle/postgres/meta/_journal.json

@@ -295,6 +295,13 @@
       "when": 1790224430003,
       "tag": "0041_watery_zeigeist",
       "breakpoints": true
+    },
+    {
+      "idx": 42,
+      "version": "7",
+      "when": 1790225599928,
+      "tag": "0042_strange_shocker",
+      "breakpoints": true
     }
   ]
 }