Enhance logging configuration and add SQLite structured log persistence. Secure default admin credentials.

src/apps/Elsa.ModularServer.Web/appsettings.json

@@ -3,6 +3,7 @@
     "LogLevel": {
       "Default": "Information",
       "Microsoft.AspNetCore": "Warning",
+      "Microsoft.EntityFrameworkCore": "Warning",
       "Nuplane": "Warning"
     }
   },
@@ -24,7 +25,7 @@
           },
           "DefaultAdminUser": {
             "AdminUserName": "admin",
-            "AdminPassword": "",
+            "AdminPassword": "password",
             "AdminRoleName": "admin",
             "AdminRolePermissions": [
               "*"
@@ -45,6 +46,9 @@
             }
           },
           "StructuredLogs": {},
+          "SqliteStructuredLogPersistence": {
+            "ConnectionString": "Data Source=elsa_logs.db;Cache=Shared"
+          },
           "SampleEndpoint": {}
         }
       }