feat(13-02): implement MavenSource and NuGetSource with tests

- MavenSource queries Maven Central Solr API for provider keyword matches
- NuGetSource queries NuGet gallery search API with projectUrl fallback
- Both sources: httptest fixtures, ctx cancellation, metadata tests

pkg/recon/sources/nuget_test.go

@@ -0,0 +1,122 @@
+package sources
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"github.com/salvacybersec/keyhunter/pkg/providers"
+	"github.com/salvacybersec/keyhunter/pkg/recon"
+)
+
+func nugetTestRegistry() *providers.Registry {
+	return providers.NewRegistryFromProviders([]providers.Provider{
+		{Name: "openai", Keywords: []string{"sk-proj-"}},
+	})
+}
+
+const nugetFixtureJSON = `{
+  "data": [
+    {"id": "OpenAI.SDK", "version": "2.1.0", "projectUrl": "https://github.com/example/openai-sdk"},
+    {"id": "LLM.Client", "version": "1.0.0", "projectUrl": ""}
+  ]
+}`
+
+func newNuGetTestSource(srvURL string) *NuGetSource {
+	return &NuGetSource{
+		BaseURL:  srvURL,
+		Registry: nugetTestRegistry(),
+		Limiters: recon.NewLimiterRegistry(),
+		Client:   NewClient(),
+	}
+}
+
+func TestNuGet_Sweep_ExtractsFindings(t *testing.T) {
+	var hits int
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/query" {
+			t.Errorf("unexpected path: %s", r.URL.Path)
+		}
+		if r.URL.Query().Get("q") == "" {
+			t.Errorf("missing q param")
+		}
+		hits++
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(nugetFixtureJSON))
+	}))
+	defer srv.Close()
+
+	src := newNuGetTestSource(srv.URL)
+	out := make(chan recon.Finding, 16)
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	if err := src.Sweep(ctx, "", out); err != nil {
+		t.Fatalf("Sweep err: %v", err)
+	}
+	close(out)
+
+	var findings []recon.Finding
+	for f := range out {
+		findings = append(findings, f)
+	}
+	if len(findings) != 2 {
+		t.Fatalf("expected 2 findings, got %d", len(findings))
+	}
+
+	// First package has projectUrl set
+	if findings[0].Source != "https://github.com/example/openai-sdk" {
+		t.Errorf("expected projectUrl for first finding, got: %s", findings[0].Source)
+	}
+	// Second package has empty projectUrl -> fallback
+	if findings[1].Source != "https://www.nuget.org/packages/LLM.Client" {
+		t.Errorf("expected nuget.org fallback for second finding, got: %s", findings[1].Source)
+	}
+	for _, f := range findings {
+		if f.SourceType != "recon:nuget" {
+			t.Errorf("unexpected SourceType: %s", f.SourceType)
+		}
+	}
+	if hits == 0 {
+		t.Fatal("server was never hit")
+	}
+}
+
+func TestNuGet_NameAndRate(t *testing.T) {
+	s := &NuGetSource{}
+	if s.Name() != "nuget" {
+		t.Errorf("unexpected name: %s", s.Name())
+	}
+	if s.Burst() != 3 {
+		t.Errorf("burst: %d", s.Burst())
+	}
+	if s.RespectsRobots() {
+		t.Error("expected RespectsRobots=false")
+	}
+}
+
+func TestNuGet_EnabledAlwaysTrue(t *testing.T) {
+	s := &NuGetSource{}
+	if !s.Enabled(recon.Config{}) {
+		t.Fatal("expected Enabled=true")
+	}
+}
+
+func TestNuGet_Sweep_CtxCancelled(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		time.Sleep(500 * time.Millisecond)
+		_, _ = w.Write([]byte(nugetFixtureJSON))
+	}))
+	defer srv.Close()
+
+	src := newNuGetTestSource(srv.URL)
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	out := make(chan recon.Finding, 4)
+	if err := src.Sweep(ctx, "", out); err == nil {
+		t.Fatal("expected ctx error")
+	}
+}