feat(13-03): implement TerraformSource and HelmSource

- Terraform searches registry.terraform.io v1 modules API with namespace/name/provider URLs
- Helm searches artifacthub.io for charts (kind=0) with repo/chart URL construction
- Both sources: context cancellation, nil registry, httptest-based tests

pkg/recon/sources/helm_test.go

@@ -0,0 +1,192 @@
+package sources
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/salvacybersec/keyhunter/pkg/recon"
+)
+
+func helmStubHandler(t *testing.T, calls *int32) http.HandlerFunc {
+	t.Helper()
+	return func(w http.ResponseWriter, r *http.Request) {
+		atomic.AddInt32(calls, 1)
+		if r.URL.Path != "/api/v1/packages/search" {
+			t.Errorf("unexpected path: %s", r.URL.Path)
+		}
+		if r.URL.Query().Get("ts_query_web") == "" {
+			t.Errorf("missing ts_query_web param")
+		}
+		if got := r.URL.Query().Get("kind"); got != "0" {
+			t.Errorf("expected kind=0, got %q", got)
+		}
+		body := artifactHubSearchResponse{
+			Packages: []artifactHubPackage{
+				{
+					PackageID:      "chart-1",
+					Name:           "openai-proxy",
+					NormalizedName: "openai-proxy",
+					Repository:     artifactHubRepo{Name: "bitnami", Kind: 0},
+				},
+				{
+					PackageID:      "chart-2",
+					Name:           "llm-stack",
+					NormalizedName: "llm-stack",
+					Repository:     artifactHubRepo{Name: "community", Kind: 0},
+				},
+			},
+		}
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(body)
+	}
+}
+
+func TestHelm_SweepEmitsFindings(t *testing.T) {
+	reg := syntheticRegistry()
+	lim := recon.NewLimiterRegistry()
+	_ = lim.For("helm", 1000, 100)
+
+	var calls int32
+	srv := httptest.NewServer(helmStubHandler(t, &calls))
+	defer srv.Close()
+
+	src := &HelmSource{
+		BaseURL:  srv.URL,
+		Registry: reg,
+		Limiters: lim,
+		Client:   NewClient(),
+	}
+
+	out := make(chan recon.Finding, 32)
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	done := make(chan error, 1)
+	go func() { done <- src.Sweep(ctx, "", out); close(out) }()
+
+	var findings []recon.Finding
+	for f := range out {
+		findings = append(findings, f)
+	}
+	if err := <-done; err != nil {
+		t.Fatalf("Sweep error: %v", err)
+	}
+
+	// 2 keywords * 2 charts = 4 findings
+	if len(findings) != 4 {
+		t.Fatalf("expected 4 findings, got %d", len(findings))
+	}
+	for _, f := range findings {
+		if f.SourceType != "recon:helm" {
+			t.Errorf("SourceType=%q want recon:helm", f.SourceType)
+		}
+	}
+	if got := atomic.LoadInt32(&calls); got != 2 {
+		t.Errorf("expected 2 server calls, got %d", got)
+	}
+}
+
+func TestHelm_ChartURLConstruction(t *testing.T) {
+	reg := syntheticRegistry()
+	lim := recon.NewLimiterRegistry()
+	_ = lim.For("helm", 1000, 100)
+
+	var calls int32
+	srv := httptest.NewServer(helmStubHandler(t, &calls))
+	defer srv.Close()
+
+	src := &HelmSource{
+		BaseURL:  srv.URL,
+		Registry: reg,
+		Limiters: lim,
+		Client:   NewClient(),
+	}
+
+	out := make(chan recon.Finding, 32)
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	done := make(chan error, 1)
+	go func() { done <- src.Sweep(ctx, "", out); close(out) }()
+
+	var findings []recon.Finding
+	for f := range out {
+		findings = append(findings, f)
+	}
+	if err := <-done; err != nil {
+		t.Fatalf("Sweep error: %v", err)
+	}
+
+	hasBitnami := false
+	hasCommunity := false
+	for _, f := range findings {
+		if contains(f.Source, "/packages/helm/bitnami/openai-proxy") {
+			hasBitnami = true
+		}
+		if contains(f.Source, "/packages/helm/community/llm-stack") {
+			hasCommunity = true
+		}
+	}
+	if !hasBitnami {
+		t.Error("expected finding with bitnami/openai-proxy chart URL")
+	}
+	if !hasCommunity {
+		t.Error("expected finding with community/llm-stack chart URL")
+	}
+}
+
+func TestHelm_EnabledAlwaysTrue(t *testing.T) {
+	s := &HelmSource{}
+	if !s.Enabled(recon.Config{}) {
+		t.Fatal("expected Enabled=true")
+	}
+}
+
+func TestHelm_NameAndRate(t *testing.T) {
+	s := &HelmSource{}
+	if s.Name() != "helm" {
+		t.Errorf("unexpected name: %s", s.Name())
+	}
+	if s.Burst() != 2 {
+		t.Errorf("burst: %d", s.Burst())
+	}
+	if s.RespectsRobots() {
+		t.Error("expected RespectsRobots=false")
+	}
+}
+
+func TestHelm_CtxCancelled(t *testing.T) {
+	reg := syntheticRegistry()
+	lim := recon.NewLimiterRegistry()
+	_ = lim.For("helm", 1000, 100)
+
+	src := &HelmSource{
+		BaseURL:  "http://127.0.0.1:1",
+		Registry: reg,
+		Limiters: lim,
+		Client:   NewClient(),
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	out := make(chan recon.Finding, 1)
+	err := src.Sweep(ctx, "", out)
+	if !errors.Is(err, context.Canceled) {
+		t.Fatalf("expected context.Canceled, got %v", err)
+	}
+}
+
+func TestHelm_NilRegistryNoError(t *testing.T) {
+	src := &HelmSource{Client: NewClient()}
+	out := make(chan recon.Finding, 1)
+	if err := src.Sweep(context.Background(), "", out); err != nil {
+		t.Fatalf("expected nil, got %v", err)
+	}
+}