feat(backend): add option to disable postgres connection pooling

Foxnouns.Backend/Config.cs

@@ -36,6 +36,7 @@ public class Config
     public class DatabaseConfig
     {
         public string Url { get; init; } = string.Empty;
+        public bool? EnablePooling { get; init; }
         public int? Timeout { get; init; }
         public int? MaxPoolSize { get; init; }
     }

Foxnouns.Backend/Database/DatabaseContext.cs

@@ -26,6 +26,7 @@ public class DatabaseContext : DbContext
     {
         var connString = new NpgsqlConnectionStringBuilder(config.Database.Url)
         {
+            Pooling = config.Database.EnablePooling ?? true,
             Timeout = config.Database.Timeout ?? 5,
             MaxPoolSize = config.Database.MaxPoolSize ?? 50,
             MinPoolSize = 0,

Foxnouns.Backend/config.example.ini

@@ -30,6 +30,8 @@ MetricsPort = 5001
 [Database]
 ; The database URL in ADO.NET format.
 Url = "Host=localhost;Database=foxnouns_net;Username=pronouns;Password=pronouns"
+; Whether to enable connection pooling. This should be turned off if using pgbouncer. Defaults to true.
+EnablePooling = true
 ; The timeout for opening new connections. Defaults to 5.
 Timeout = 5
 ; The maximum number of open connections. Defaults to 50.