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/sentry.go

@@ -0,0 +1,152 @@
+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"
+)
+
+// SentrySource searches exposed Sentry instances for API keys in error reports.
+// Self-hosted Sentry installations may have the API accessible without
+// authentication, exposing error events that commonly contain API keys in
+// request headers, environment variables, and stack traces.
+type SentrySource struct {
+	BaseURL  string
+	Registry *providers.Registry
+	Limiters *recon.LimiterRegistry
+	Client   *Client
+}
+
+var _ recon.ReconSource = (*SentrySource)(nil)
+
+func (s *SentrySource) Name() string              { return "sentry" }
+func (s *SentrySource) RateLimit() rate.Limit      { return rate.Every(2 * time.Second) }
+func (s *SentrySource) Burst() int                 { return 3 }
+func (s *SentrySource) RespectsRobots() bool       { return false }
+func (s *SentrySource) Enabled(_ recon.Config) bool { return true }
+
+// sentryIssue represents a Sentry issue from the issues list API.
+type sentryIssue struct {
+	ID    string `json:"id"`
+	Title string `json:"title"`
+}
+
+// sentryEvent represents a Sentry event from the events API.
+type sentryEvent struct {
+	EventID string          `json:"eventID"`
+	Tags    json.RawMessage `json:"tags"`
+	Context json.RawMessage `json:"context"`
+	Entries json.RawMessage `json:"entries"`
+}
+
+func (s *SentrySource) Sweep(ctx context.Context, query string, out chan<- recon.Finding) error {
+	base := s.BaseURL
+	if base == "" {
+		base = "https://sentry.example.com"
+	}
+	client := s.Client
+	if client == nil {
+		client = NewClient()
+	}
+
+	queries := BuildQueries(s.Registry, "sentry")
+	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 issues matching keyword.
+		issuesURL := fmt.Sprintf(
+			"%s/api/0/issues/?query=%s&limit=10",
+			base, url.QueryEscape(q),
+		)
+		req, err := http.NewRequestWithContext(ctx, http.MethodGet, issuesURL, 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 issues []sentryIssue
+		if err := json.Unmarshal(data, &issues); err != nil {
+			continue
+		}
+
+		// Fetch events for each issue.
+		for _, issue := range issues {
+			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
+				}
+			}
+
+			eventsURL := fmt.Sprintf("%s/api/0/issues/%s/events/?limit=5", base, issue.ID)
+			evReq, err := http.NewRequestWithContext(ctx, http.MethodGet, eventsURL, nil)
+			if err != nil {
+				continue
+			}
+
+			evResp, err := client.Do(ctx, evReq)
+			if err != nil {
+				continue
+			}
+
+			evData, err := io.ReadAll(io.LimitReader(evResp.Body, 512*1024))
+			_ = evResp.Body.Close()
+			if err != nil {
+				continue
+			}
+
+			var events []sentryEvent
+			if err := json.Unmarshal(evData, &events); err != nil {
+				continue
+			}
+
+			for _, ev := range events {
+				content := string(ev.Tags) + string(ev.Context) + string(ev.Entries)
+				if ciLogKeyPattern.MatchString(content) {
+					out <- recon.Finding{
+						ProviderName: q,
+						Source:       fmt.Sprintf("%s/issues/%s/events/%s", base, issue.ID, ev.EventID),
+						SourceType:   "recon:sentry",
+						Confidence:   "medium",
+						DetectedAt:   time.Now(),
+					}
+				}
+			}
+		}
+	}
+	return nil
+}