Add tests for main package, manager, and various components

- Introduced unit tests for the main package to ensure compilation.
- Added tests for the manager, including validation of upload sessions and handling of Blender binary paths.
- Implemented tests for job token generation and validation, ensuring security and integrity.
- Created tests for configuration management and database schema to verify functionality.
- Added tests for logger and runner components to enhance overall test coverage and reliability.

internal/runner/api/jobconn_test.go

@@ -0,0 +1,44 @@
+package api
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/gorilla/websocket"
+)
+
+func TestJobConnection_ConnectAndClose(t *testing.T) {
+	upgrader := websocket.Upgrader{}
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		conn, err := upgrader.Upgrade(w, r, nil)
+		if err != nil {
+			return
+		}
+		defer conn.Close()
+
+		var msg map[string]interface{}
+		if err := conn.ReadJSON(&msg); err != nil {
+			return
+		}
+		if msg["type"] == "auth" {
+			_ = conn.WriteJSON(map[string]string{"type": "auth_ok"})
+		}
+		// Keep open briefly so client can mark connected.
+		time.Sleep(100 * time.Millisecond)
+	}))
+	defer server.Close()
+
+	jc := NewJobConnection()
+	managerURL := strings.Replace(server.URL, "http://", "http://", 1)
+	if err := jc.Connect(managerURL, "/job/1", "token123"); err != nil {
+		t.Fatalf("Connect failed: %v", err)
+	}
+	if !jc.IsConnected() {
+		t.Fatal("expected connection to be marked connected")
+	}
+	jc.Close()
+}
+