fix(GRO-574): add rate_limit table migration for Better Auth

Adds the missing rate_limit table that Better Auth v1.5.6 requires when rateLimit.storage is set to 'database'. Without this table, all auth endpoints return HTTP 500.

Also includes GRO-566: SKIP_OOBE env var to bypass setup wizard in dev/test.

cc @cpfarhood

packages/db/migrations/0025_rate_limit.sql

@@ -0,0 +1,6 @@
+-- Better-Auth rate limiting table (GRO-574)
+CREATE TABLE "rate_limit" (
+  key TEXT NOT NULL PRIMARY KEY,
+  count INTEGER NOT NULL,
+  last_request BIGINT NOT NULL
+);

packages/db/migrations/meta/_journal.json

@@ -176,6 +176,13 @@
       "when": 1775396067192,
       "tag": "0024_invoice_indexes",
       "breakpoints": true
+    },
+    {
+      "idx": 25,
+      "version": "7",
+      "when": 1775482467192,
+      "tag": "0025_rate_limit",
+      "breakpoints": true
     }
   ]
 }