feat(15-03): add Grafana and Sentry ReconSource implementations

- GrafanaSource: search dashboards via /api/search, fetch detail via /api/dashboards/uid
- SentrySource: search issues via /api/0/issues, fetch events for key detection
- Register all 5 log aggregator sources in RegisterAll (67 sources total)
- Tests use httptest mocks for each API endpoint

pkg/recon/sources/grafana_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 TestGrafana_Name(t *testing.T) {
+	s := &GrafanaSource{}
+	if s.Name() != "grafana" {
+		t.Fatalf("expected grafana, got %s", s.Name())
+	}
+}
+
+func TestGrafana_Enabled(t *testing.T) {
+	s := &GrafanaSource{}
+	if !s.Enabled(recon.Config{}) {
+		t.Fatal("GrafanaSource should always be enabled")
+	}
+}
+
+func TestGrafana_Sweep(t *testing.T) {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/api/search", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(`[{"uid":"abc123","title":"API-Monitoring"}]`))
+	})
+	mux.HandleFunc("/api/dashboards/uid/abc123", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(`{
+			"dashboard": {
+				"panels": [
+					{
+						"title": "Key Usage",
+						"targets": [
+							{"expr": "api_key = sk-proj-ABCDEF1234567890abcdef"}
+						]
+					}
+				]
+			}
+		}`))
+	})
+
+	srv := httptest.NewServer(mux)
+	defer srv.Close()
+
+	reg := providers.NewRegistryFromProviders([]providers.Provider{
+		{Name: "openai", Keywords: []string{"sk-proj-"}},
+	})
+
+	s := &GrafanaSource{
+		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 Grafana")
+	}
+	if findings[0].SourceType != "recon:grafana" {
+		t.Fatalf("expected recon:grafana, got %s", findings[0].SourceType)
+	}
+}
+
+func TestGrafana_Sweep_NoDashboards(t *testing.T) {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/api/search", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(`[]`))
+	})
+
+	srv := httptest.NewServer(mux)
+	defer srv.Close()
+
+	reg := providers.NewRegistryFromProviders([]providers.Provider{
+		{Name: "openai", Keywords: []string{"sk-proj-"}},
+	})
+
+	s := &GrafanaSource{
+		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))
+	}
+}