Add migration to add auth_user_id column to users table

- Introduced a new column 'auth_user_id' of type UUID to the 'users' table.
- Updated existing user data to set 'auth_user_id' to null for UserId 1.
- Created a unique index on 'auth_user_id' to enforce uniqueness.
- Implemented rollback functionality to remove the column and index if needed.

Backend/ERPCore/appsettings.json

@@ -8,11 +8,12 @@
   "ConnectionStrings": {
     "DefaultConnection": "Host=localhost;Port=5432;Database=ERPCore;Username=CHANGE_ME;Password=CHANGE_ME"
   },
-  "Jwt": {
-    "Issuer": "ERPCore",
-    "Audience": "ERPCore.Clients",
-    "SigningKey": "CHANGE_ME_DEV_ONLY_32+_CHARS",
-    "AccessTokenMinutes": 120
+  "Auth": {
+    "Issuer": "AuthHex",
+    "Audience": "AuthHexClient",
+    "RsaPublicKeyXml": "<RSAKeyValue><Modulus>1LlNkMBQNdpXJiDal7XMxkG/3ad+YBsMCuY9JD/abHMzniFXtQlovjfbeaaHJ0v1kvSo9731CJ0YC1qhPU5rPQwZwxOWZ9BOBZlMDghONdjOH/HyCUbb5Z18ibqc0QenFSnEYz+jkVZiayj8DV/+VUe+eKzpQTlU6aWtHvlbwfuXaDu+QvFlpLJ7/m8na+0s2nYhLX8Wfi4C/2AoNaYhFkIwYhMMGoaSHuIoQ5R6181Rh0gKvYopRW+IpTD5RV8bXV3AM6zOcoisOifBYROHwA5ZZpoHXuTvHYmPWW8kL8PKme7BwBldPi8KrJUroRE+WXA87aAA5Wtt1oxePcXvhQ==</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>",
+    "RequiredUserTypeCode": "",
+    "RequiredRoleCode": ""
   },
   "AllowedHosts": "*"
 }