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.go

@@ -0,0 +1,140 @@
+package sources
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"time"
+
+	"golang.org/x/time/rate"
+
+	"github.com/salvacybersec/keyhunter/pkg/providers"
+	"github.com/salvacybersec/keyhunter/pkg/recon"
+)
+
+// GrafanaSource searches exposed Grafana instances for API keys in dashboard
+// configurations, panel queries, and data source settings. Many Grafana
+// deployments enable anonymous access, exposing dashboards publicly.
+type GrafanaSource struct {
+	BaseURL  string
+	Registry *providers.Registry
+	Limiters *recon.LimiterRegistry
+	Client   *Client
+}
+
+var _ recon.ReconSource = (*GrafanaSource)(nil)
+
+func (s *GrafanaSource) Name() string              { return "grafana" }
+func (s *GrafanaSource) RateLimit() rate.Limit      { return rate.Every(2 * time.Second) }
+func (s *GrafanaSource) Burst() int                 { return 3 }
+func (s *GrafanaSource) RespectsRobots() bool       { return false }
+func (s *GrafanaSource) Enabled(_ recon.Config) bool { return true }
+
+// grafanaSearchResult represents a Grafana dashboard search result.
+type grafanaSearchResult struct {
+	UID   string `json:"uid"`
+	Title string `json:"title"`
+}
+
+// grafanaDashboardResponse represents the full dashboard detail response.
+type grafanaDashboardResponse struct {
+	Dashboard json.RawMessage `json:"dashboard"`
+}
+
+func (s *GrafanaSource) Sweep(ctx context.Context, query string, out chan<- recon.Finding) error {
+	base := s.BaseURL
+	if base == "" {
+		base = "http://localhost:3000"
+	}
+	client := s.Client
+	if client == nil {
+		client = NewClient()
+	}
+
+	queries := BuildQueries(s.Registry, "grafana")
+	if len(queries) == 0 {
+		return nil
+	}
+
+	for _, q := range queries {
+		if err := ctx.Err(); err != nil {
+			return err
+		}
+
+		if s.Limiters != nil {
+			if err := s.Limiters.Wait(ctx, s.Name(), s.RateLimit(), s.Burst(), false); err != nil {
+				return err
+			}
+		}
+
+		// Search for dashboards matching keyword.
+		searchURL := fmt.Sprintf(
+			"%s/api/search?query=%s&type=dash-db&limit=10",
+			base, url.QueryEscape(q),
+		)
+		req, err := http.NewRequestWithContext(ctx, http.MethodGet, searchURL, nil)
+		if err != nil {
+			continue
+		}
+
+		resp, err := client.Do(ctx, req)
+		if err != nil {
+			continue
+		}
+
+		data, err := io.ReadAll(io.LimitReader(resp.Body, 512*1024))
+		_ = resp.Body.Close()
+		if err != nil {
+			continue
+		}
+
+		var results []grafanaSearchResult
+		if err := json.Unmarshal(data, &results); err != nil {
+			continue
+		}
+
+		// Fetch each dashboard detail and scan for keys.
+		for _, dash := range results {
+			if err := ctx.Err(); err != nil {
+				return err
+			}
+
+			if s.Limiters != nil {
+				if err := s.Limiters.Wait(ctx, s.Name(), s.RateLimit(), s.Burst(), false); err != nil {
+					return err
+				}
+			}
+
+			dashURL := fmt.Sprintf("%s/api/dashboards/uid/%s", base, dash.UID)
+			dashReq, err := http.NewRequestWithContext(ctx, http.MethodGet, dashURL, nil)
+			if err != nil {
+				continue
+			}
+
+			dashResp, err := client.Do(ctx, dashReq)
+			if err != nil {
+				continue
+			}
+
+			dashData, err := io.ReadAll(io.LimitReader(dashResp.Body, 512*1024))
+			_ = dashResp.Body.Close()
+			if err != nil {
+				continue
+			}
+
+			if ciLogKeyPattern.Match(dashData) {
+				out <- recon.Finding{
+					ProviderName: q,
+					Source:       fmt.Sprintf("%s/d/%s/%s", base, dash.UID, dash.Title),
+					SourceType:   "recon:grafana",
+					Confidence:   "medium",
+					DetectedAt:   time.Now(),
+				}
+			}
+		}
+	}
+	return nil
+}