feat(16-01): add VirusTotal and IntelligenceX recon sources

- VirusTotalSource searches VT Intelligence API for files containing API keys
- IntelligenceXSource searches IX archive with 3-step flow (search/results/read)
- Both credential-gated (Enabled returns false without API key)
- ciLogKeyPattern used for content matching
- Tests with httptest mocks for happy path and empty results

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pkg/recon/sources/intelligencex_test.go

@@ -0,0 +1,151 @@
+package sources
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"github.com/salvacybersec/keyhunter/pkg/providers"
+	"github.com/salvacybersec/keyhunter/pkg/recon"
+)
+
+func TestIntelligenceX_Name(t *testing.T) {
+	s := &IntelligenceXSource{}
+	if s.Name() != "intelligencex" {
+		t.Fatalf("expected intelligencex, got %s", s.Name())
+	}
+}
+
+func TestIntelligenceX_Enabled(t *testing.T) {
+	s := &IntelligenceXSource{}
+	if s.Enabled(recon.Config{}) {
+		t.Fatal("IntelligenceXSource should be disabled without API key")
+	}
+	s.APIKey = "test-key"
+	if !s.Enabled(recon.Config{}) {
+		t.Fatal("IntelligenceXSource should be enabled with API key")
+	}
+}
+
+func TestIntelligenceX_Sweep(t *testing.T) {
+	mux := http.NewServeMux()
+
+	// Search initiation endpoint.
+	mux.HandleFunc("/intelligent/search", func(w http.ResponseWriter, r *http.Request) {
+		if r.Method == http.MethodPost {
+			if r.Header.Get("x-key") != "test-key" {
+				http.Error(w, "unauthorized", http.StatusUnauthorized)
+				return
+			}
+			w.Header().Set("Content-Type", "application/json")
+			_, _ = w.Write([]byte(`{"id":"search-42","status":0}`))
+			return
+		}
+		http.Error(w, "not found", http.StatusNotFound)
+	})
+
+	// Search results endpoint.
+	mux.HandleFunc("/intelligent/search/result", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(`{
+			"records": [{
+				"systemid": "sys-001",
+				"name": "leak.txt",
+				"storageid": "store-001",
+				"bucket": "bucket-a"
+			}]
+		}`))
+	})
+
+	// File read endpoint.
+	mux.HandleFunc("/file/read", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "text/plain")
+		_, _ = w.Write([]byte(`config:
+  api_key = "sk-proj-ABCDEF1234567890abcdef"
+  secret_key: "super-secret-value-1234567890ab"
+`))
+	})
+
+	srv := httptest.NewServer(mux)
+	defer srv.Close()
+
+	reg := providers.NewRegistryFromProviders([]providers.Provider{
+		{Name: "openai", Keywords: []string{"sk-proj-"}},
+	})
+
+	s := &IntelligenceXSource{
+		APIKey:   "test-key",
+		BaseURL:  srv.URL,
+		Registry: reg,
+		Client:   NewClient(),
+	}
+
+	out := make(chan recon.Finding, 10)
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	err := s.Sweep(ctx, "", out)
+	close(out)
+	if err != nil {
+		t.Fatalf("Sweep error: %v", err)
+	}
+
+	var findings []recon.Finding
+	for f := range out {
+		findings = append(findings, f)
+	}
+	if len(findings) == 0 {
+		t.Fatal("expected at least one finding from IntelligenceX")
+	}
+	if findings[0].SourceType != "recon:intelligencex" {
+		t.Fatalf("expected recon:intelligencex, got %s", findings[0].SourceType)
+	}
+}
+
+func TestIntelligenceX_Sweep_Empty(t *testing.T) {
+	mux := http.NewServeMux()
+
+	mux.HandleFunc("/intelligent/search", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(`{"id":"search-empty","status":0}`))
+	})
+
+	mux.HandleFunc("/intelligent/search/result", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(`{"records": []}`))
+	})
+
+	srv := httptest.NewServer(mux)
+	defer srv.Close()
+
+	reg := providers.NewRegistryFromProviders([]providers.Provider{
+		{Name: "openai", Keywords: []string{"sk-proj-"}},
+	})
+
+	s := &IntelligenceXSource{
+		APIKey:   "test-key",
+		BaseURL:  srv.URL,
+		Registry: reg,
+		Client:   NewClient(),
+	}
+
+	out := make(chan recon.Finding, 10)
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	err := s.Sweep(ctx, "", out)
+	close(out)
+	if err != nil {
+		t.Fatalf("Sweep error: %v", err)
+	}
+
+	var findings []recon.Finding
+	for f := range out {
+		findings = append(findings, f)
+	}
+	if len(findings) != 0 {
+		t.Fatalf("expected no findings, got %d", len(findings))
+	}
+}