feat(14-01): add 5 CI/CD log sources (GitHubActions, TravisCI, CircleCI, Jenkins, GitLabCI)

- GitHubActionsSource: searches GitHub code search for workflow files with provider keywords (token-gated)
- TravisCISource: queries Travis CI v3 API for public build logs (credentialless)
- CircleCISource: queries CircleCI v2 pipeline API for build pipelines (token-gated)
- JenkinsSource: queries open Jenkins /api/json for job build consoles (credentialless)
- GitLabCISource: queries GitLab projects API for CI-enabled projects (token-gated)
- RegisterAll extended to 45 sources (40 Phase 10-13 + 5 Phase 14)
- Integration test updated with fixtures for all 5 new sources
- cmd/recon.go wires CIRCLECI_TOKEN env var

pkg/recon/sources/jenkins.go

@@ -0,0 +1,135 @@
+package sources
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+
+	"golang.org/x/time/rate"
+
+	"github.com/salvacybersec/keyhunter/pkg/providers"
+	"github.com/salvacybersec/keyhunter/pkg/recon"
+)
+
+// JenkinsSource searches publicly accessible Jenkins instances for build
+// console output containing leaked API keys. It queries the Jenkins JSON API
+// at /api/json to enumerate jobs and their latest builds. Credentialless --
+// targets open Jenkins instances discovered via dorking or IoT scanners.
+type JenkinsSource struct {
+	BaseURL  string
+	Registry *providers.Registry
+	Limiters *recon.LimiterRegistry
+	Client   *Client
+}
+
+var _ recon.ReconSource = (*JenkinsSource)(nil)
+
+func (s *JenkinsSource) Name() string             { return "jenkins" }
+func (s *JenkinsSource) RateLimit() rate.Limit    { return rate.Every(3 * time.Second) }
+func (s *JenkinsSource) Burst() int               { return 1 }
+func (s *JenkinsSource) RespectsRobots() bool     { return true }
+func (s *JenkinsSource) Enabled(_ recon.Config) bool { return true }
+
+type jenkinsJobsResponse struct {
+	Jobs []jenkinsJob `json:"jobs"`
+}
+
+type jenkinsJob struct {
+	Name     string       `json:"name"`
+	URL      string       `json:"url"`
+	LastBuild *jenkinsBuild `json:"lastBuild"`
+}
+
+type jenkinsBuild struct {
+	Number int    `json:"number"`
+	URL    string `json:"url"`
+}
+
+func (s *JenkinsSource) Sweep(ctx context.Context, _ string, out chan<- recon.Finding) error {
+	base := s.BaseURL
+	if base == "" {
+		base = "https://jenkins.example.com"
+	}
+	client := s.Client
+	if client == nil {
+		client = NewClient()
+	}
+
+	queries := BuildQueries(s.Registry, "jenkins")
+	kwIndex := jenkinsKeywordIndex(s.Registry)
+
+	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
+			}
+		}
+
+		endpoint := fmt.Sprintf("%s/api/json?tree=jobs[name,url,lastBuild[number,url]]", base)
+		req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint, nil)
+		if err != nil {
+			return fmt.Errorf("jenkins: build request: %w", err)
+		}
+		req.Header.Set("Accept", "application/json")
+
+		resp, err := client.Do(ctx, req)
+		if err != nil {
+			continue
+		}
+
+		var result jenkinsJobsResponse
+		decErr := json.NewDecoder(resp.Body).Decode(&result)
+		_ = resp.Body.Close()
+		if decErr != nil {
+			continue
+		}
+
+		provName := kwIndex[strings.ToLower(q)]
+		for _, job := range result.Jobs {
+			if job.LastBuild == nil {
+				continue
+			}
+			source := job.LastBuild.URL
+			if source == "" {
+				source = fmt.Sprintf("%s/job/%s/%d/console", base, job.Name, job.LastBuild.Number)
+			}
+			f := recon.Finding{
+				ProviderName: provName,
+				Confidence:   "low",
+				Source:       source,
+				SourceType:   "recon:jenkins",
+				DetectedAt:   time.Now(),
+			}
+			select {
+			case out <- f:
+			case <-ctx.Done():
+				return ctx.Err()
+			}
+		}
+	}
+	return nil
+}
+
+func jenkinsKeywordIndex(reg *providers.Registry) map[string]string {
+	m := make(map[string]string)
+	if reg == nil {
+		return m
+	}
+	for _, p := range reg.List() {
+		for _, k := range p.Keywords {
+			kl := strings.ToLower(strings.TrimSpace(k))
+			if kl != "" {
+				if _, exists := m[kl]; !exists {
+					m[kl] = p.Name
+				}
+			}
+		}
+	}
+	return m
+}