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/circleci_test.go

@@ -0,0 +1,102 @@
+package sources
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"github.com/salvacybersec/keyhunter/pkg/providers"
+	"github.com/salvacybersec/keyhunter/pkg/recon"
+)
+
+const circleFixtureJSON = `{
+  "items": [
+    {
+      "id": "pipeline-uuid-1",
+      "vcs": {"provider_name": "github", "target_repository_url": "https://github.com/alice/repo"}
+    },
+    {
+      "id": "pipeline-uuid-2",
+      "vcs": {"provider_name": "github", "target_repository_url": ""}
+    }
+  ]
+}`
+
+func TestCircleCI_Sweep_ExtractsFindings(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/pipeline" {
+			t.Errorf("unexpected path: %s", r.URL.Path)
+		}
+		if r.Header.Get("Circle-Token") == "" {
+			t.Error("missing Circle-Token header")
+		}
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(circleFixtureJSON))
+	}))
+	defer srv.Close()
+
+	src := &CircleCISource{
+		Token:    "test-token",
+		BaseURL:  srv.URL,
+		Registry: providers.NewRegistryFromProviders([]providers.Provider{
+			{Name: "openai", Keywords: []string{"sk-proj-"}},
+		}),
+		Limiters: recon.NewLimiterRegistry(),
+		Client:   NewClient(),
+	}
+
+	out := make(chan recon.Finding, 16)
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	if err := src.Sweep(ctx, "", out); err != nil {
+		t.Fatalf("Sweep err: %v", err)
+	}
+	close(out)
+
+	var findings []recon.Finding
+	for f := range out {
+		findings = append(findings, f)
+	}
+	if len(findings) != 2 {
+		t.Fatalf("expected 2 findings, got %d", len(findings))
+	}
+	// First pipeline has VCS URL, second falls back to app URL.
+	if findings[0].Source != "https://github.com/alice/repo" {
+		t.Errorf("unexpected source[0]: %s", findings[0].Source)
+	}
+	if findings[1].Source != "https://app.circleci.com/pipelines/pipeline-uuid-2" {
+		t.Errorf("unexpected source[1]: %s", findings[1].Source)
+	}
+	for _, f := range findings {
+		if f.SourceType != "recon:circleci" {
+			t.Errorf("unexpected SourceType: %s", f.SourceType)
+		}
+	}
+}
+
+func TestCircleCI_EnabledOnlyWithToken(t *testing.T) {
+	s := &CircleCISource{}
+	if s.Enabled(recon.Config{}) {
+		t.Fatal("expected Enabled=false without token")
+	}
+	s.Token = "test"
+	if !s.Enabled(recon.Config{}) {
+		t.Fatal("expected Enabled=true with token")
+	}
+}
+
+func TestCircleCI_NameAndRate(t *testing.T) {
+	s := &CircleCISource{}
+	if s.Name() != "circleci" {
+		t.Errorf("unexpected name: %s", s.Name())
+	}
+	if s.Burst() != 2 {
+		t.Errorf("burst: %d", s.Burst())
+	}
+	if s.RespectsRobots() {
+		t.Error("expected RespectsRobots=false")
+	}
+}