configurable sessions dir, exclude jsonl-sync from build, simplify db path

Program.cs

@@ -8,7 +8,7 @@ builder.Configuration.AddJsonFile("appsettings.user.json", optional: true, reloa
 var dbPath = builder.Configuration["DbPath"]!;
 
 builder.Services.AddSingleton<Func<SqliteConnection>>(() =>
-    new SqliteConnection($"Data Source={Path.GetFullPath(dbPath)}"));
+    new SqliteConnection($"Data Source={dbPath}"));
 
 var app = builder.Build();