feat: implement user & family group management tRPC router

- Add user router with me/update/delete procedures (protected)
- Add family router with listMembers/invite/remove/updateRole procedures
- Create user service layer (getUserById, updateUser, deleteUser)
- Create family service layer (getFamilyGroup, inviteMember, removeMember, updateMemberRole, transferOwnership)
- Add Valibot input schemas for all procedures
- Add invitations table with status tracking and expiration
- Add deletedAt column to users table (soft-delete)
- Wire user router into app root router
- Write unit tests for service functions and tRPC procedures
- Update schema tests for new table/columns

web/src/server/db/schema/index.ts

@@ -11,4 +11,5 @@ export * from "./reports";
 export * from "./marketing";
 export * from "./hometitle";
 export * from "./removebrokers";
+export * from "./invitation";
 export * from "./relations";