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/travisci.go

@@ -0,0 +1,131 @@
+package sources
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+	"time"
+
+	"golang.org/x/time/rate"
+
+	"github.com/salvacybersec/keyhunter/pkg/providers"
+	"github.com/salvacybersec/keyhunter/pkg/recon"
+)
+
+// TravisCISource searches public Travis CI build logs for leaked API keys.
+// It queries the Travis CI API v3 /builds endpoint for builds matching
+// provider keywords. No authentication required for public repositories.
+type TravisCISource struct {
+	BaseURL  string
+	Registry *providers.Registry
+	Limiters *recon.LimiterRegistry
+	Client   *Client
+}
+
+var _ recon.ReconSource = (*TravisCISource)(nil)
+
+func (s *TravisCISource) Name() string             { return "travisci" }
+func (s *TravisCISource) RateLimit() rate.Limit    { return rate.Every(3 * time.Second) }
+func (s *TravisCISource) Burst() int               { return 1 }
+func (s *TravisCISource) RespectsRobots() bool     { return true }
+func (s *TravisCISource) Enabled(_ recon.Config) bool { return true }
+
+type travisBuildResponse struct {
+	Builds []travisBuild `json:"builds"`
+}
+
+type travisBuild struct {
+	ID         int              `json:"id"`
+	State      string           `json:"state"`
+	Repository travisRepository `json:"repository"`
+}
+
+type travisRepository struct {
+	Slug string `json:"slug"`
+}
+
+func (s *TravisCISource) Sweep(ctx context.Context, _ string, out chan<- recon.Finding) error {
+	base := s.BaseURL
+	if base == "" {
+		base = "https://api.travis-ci.org"
+	}
+	client := s.Client
+	if client == nil {
+		client = NewClient()
+	}
+
+	queries := BuildQueries(s.Registry, "travisci")
+	kwIndex := travisKeywordIndex(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/builds?limit=20&sort_by=finished_at:desc&state=passed&event_type=push",
+			base)
+		req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint, nil)
+		if err != nil {
+			return fmt.Errorf("travisci: build request: %w", err)
+		}
+		req.Header.Set("Travis-API-Version", "3")
+		req.Header.Set("Accept", "application/json")
+
+		resp, err := client.Do(ctx, req)
+		if err != nil {
+			continue
+		}
+
+		var result travisBuildResponse
+		decErr := json.NewDecoder(resp.Body).Decode(&result)
+		_ = resp.Body.Close()
+		if decErr != nil {
+			continue
+		}
+
+		provName := kwIndex[strings.ToLower(q)]
+		for _, build := range result.Builds {
+			source := fmt.Sprintf("https://app.travis-ci.com/%s/builds/%d",
+				url.PathEscape(build.Repository.Slug), build.ID)
+			f := recon.Finding{
+				ProviderName: provName,
+				Confidence:   "low",
+				Source:       source,
+				SourceType:   "recon:travisci",
+				DetectedAt:   time.Now(),
+			}
+			select {
+			case out <- f:
+			case <-ctx.Done():
+				return ctx.Err()
+			}
+		}
+	}
+	return nil
+}
+
+func travisKeywordIndex(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
+}