fix(database): use per-user admin passwords

drizzle/0003_lifeos_admin_credentials.sql

@@ -0,0 +1,7 @@
+CREATE TABLE lifeos_admin_credentials (
+  user_id TEXT PRIMARY KEY,
+  salt TEXT NOT NULL,
+  password_hash TEXT NOT NULL,
+  iterations INTEGER NOT NULL,
+  updated_at TEXT NOT NULL
+);

drizzle/meta/_journal.json

@@ -22,6 +22,13 @@
       "when": 1790649000000,
       "tag": "0002_lifeos_db_admin",
       "breakpoints": true
+    },
+    {
+      "idx": 3,
+      "version": "7",
+      "when": 1790650800000,
+      "tag": "0003_lifeos_admin_credentials",
+      "breakpoints": true
     }
   ]
 }