feat: CI/CD pipeline + Learning/Medicine/Travel services

- Add Gitea Actions workflow for automated build & deploy
- Add K8s manifests: webui, travel-svc, medicine-svc, sandbox-svc
- Update kustomization for localhost:5000 registry
- Add ingress for gooseek.ru and api.gooseek.ru
- Learning cabinet with onboarding, courses, sandbox integration
- Medicine service with symptom analysis and doctor matching
- Travel service with itinerary planning
- Server setup scripts (NVIDIA/CUDA, K3s, Gitea runner)

Made-with: Cursor

backend/internal/db/learning_repo_test.go

@@ -0,0 +1,43 @@
+package db
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func TestNewLearningRepository(t *testing.T) {
+	pg := &PostgresDB{}
+	repo := NewLearningRepository(pg)
+	if repo == nil {
+		t.Fatalf("expected repository instance")
+	}
+	if repo.db != pg {
+		t.Fatalf("repository must keep provided db pointer")
+	}
+}
+
+func TestLearningUserProfileJSONContract(t *testing.T) {
+	profile := LearningUserProfile{
+		UserID:              "u-1",
+		DisplayName:         "Alex",
+		Profile:             json.RawMessage(`{"target_track":"backend"}`),
+		ResumeExtractedText: "resume text",
+		OnboardingCompleted: true,
+	}
+
+	raw, err := json.Marshal(profile)
+	if err != nil {
+		t.Fatalf("marshal profile: %v", err)
+	}
+
+	var decoded map[string]interface{}
+	if err := json.Unmarshal(raw, &decoded); err != nil {
+		t.Fatalf("unmarshal profile json: %v", err)
+	}
+	if decoded["userId"] != "u-1" {
+		t.Fatalf("unexpected userId: %v", decoded["userId"])
+	}
+	if decoded["onboardingCompleted"] != true {
+		t.Fatalf("unexpected onboardingCompleted: %v", decoded["onboardingCompleted"])
+	}
+}