Improve group management by adding parent-child relationships and fixing data validation issues.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 9111ef36-26c8-4085-84ca-a35dc1fec1b5
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/7083d608-d6d3-4a6a-9a27-6286c5109627/1e08dc6e-3788-4c72-923e-ae8af43c2a9a.jpg

migrations/0001_tearful_daimon_hellstrom.sql

@@ -0,0 +1 @@
+ALTER TABLE "groups" ADD CONSTRAINT "groups_parent_group_id_groups_id_fk" FOREIGN KEY ("parent_group_id") REFERENCES "public"."groups"("id") ON DELETE set null ON UPDATE no action;

migrations/meta/_journal.json

@@ -8,6 +8,13 @@
       "when": 1744253263119,
       "tag": "0000_tough_crystal",
       "breakpoints": true
+    },
+    {
+      "idx": 1,
+      "version": "7",
+      "when": 1744289580482,
+      "tag": "0001_tearful_daimon_hellstrom",
+      "breakpoints": true
     }
   ]
 }