feat(10-05): implement CodebergSource for Gitea REST API

- Add CodebergSource targeting /api/v1/repos/search (Codeberg + any Gitea)
- Public API by default; Authorization: token <t> when Token set
- Unauth rate limit 60/hour, authenticated ~1000/hour
- Emit Findings keyed to repo html_url with SourceType=recon:codeberg
- Keyword index maps BuildQueries output back to ProviderName
- httptest coverage: name/interface, rate limits (both modes),
  sweep decoding, header presence/absence, ctx cancellation

pkg/recon/sources/codeberg_test.go

@@ -0,0 +1,182 @@
+package sources
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+	"time"
+
+	"golang.org/x/time/rate"
+
+	"github.com/salvacybersec/keyhunter/pkg/providers"
+	"github.com/salvacybersec/keyhunter/pkg/recon"
+)
+
+func newCodebergTestRegistry() *providers.Registry {
+	return providers.NewRegistryFromProviders([]providers.Provider{
+		{
+			Name:          "openai",
+			DisplayName:   "OpenAI",
+			Tier:          1,
+			Keywords:      []string{"sk-proj-"},
+			FormatVersion: 1,
+		},
+	})
+}
+
+func TestCodebergSource_NameAndInterface(t *testing.T) {
+	var _ recon.ReconSource = (*CodebergSource)(nil)
+
+	s := &CodebergSource{}
+	if got := s.Name(); got != "codeberg" {
+		t.Errorf("Name() = %q, want %q", got, "codeberg")
+	}
+	if s.RespectsRobots() {
+		t.Errorf("RespectsRobots() = true, want false")
+	}
+	if !s.Enabled(recon.Config{}) {
+		t.Errorf("Enabled() = false, want true (public API)")
+	}
+}
+
+func TestCodebergSource_RateLimitUnauthenticated(t *testing.T) {
+	s := &CodebergSource{}
+	got := s.RateLimit()
+	want := rate.Every(60 * time.Second)
+	if got != want {
+		t.Errorf("RateLimit() no token = %v, want %v", got, want)
+	}
+	if s.Burst() != 1 {
+		t.Errorf("Burst() = %d, want 1", s.Burst())
+	}
+}
+
+func TestCodebergSource_RateLimitAuthenticated(t *testing.T) {
+	s := &CodebergSource{Token: "abc123"}
+	got := s.RateLimit()
+	want := rate.Every(3600 * time.Millisecond)
+	if got != want {
+		t.Errorf("RateLimit() with token = %v, want %v", got, want)
+	}
+}
+
+func TestCodebergSource_SweepEmitsFindings(t *testing.T) {
+	var gotAuth string
+	var gotPath string
+	var gotQuery string
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		gotAuth = r.Header.Get("Authorization")
+		gotPath = r.URL.Path
+		gotQuery = r.URL.Query().Get("q")
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(map[string]any{
+			"ok": true,
+			"data": []map[string]any{
+				{
+					"full_name": "alice/leaked-keys",
+					"html_url":  "https://codeberg.org/alice/leaked-keys",
+				},
+			},
+		})
+	}))
+	defer srv.Close()
+
+	s := &CodebergSource{
+		BaseURL:  srv.URL,
+		Registry: newCodebergTestRegistry(),
+		Limiters: recon.NewLimiterRegistry(),
+	}
+
+	out := make(chan recon.Finding, 8)
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	if err := s.Sweep(ctx, "", out); err != nil {
+		t.Fatalf("Sweep: %v", err)
+	}
+	close(out)
+
+	var findings []recon.Finding
+	for f := range out {
+		findings = append(findings, f)
+	}
+	if len(findings) == 0 {
+		t.Fatalf("expected at least one finding")
+	}
+
+	f := findings[0]
+	if f.Source != "https://codeberg.org/alice/leaked-keys" {
+		t.Errorf("Source = %q, want codeberg html_url", f.Source)
+	}
+	if f.SourceType != "recon:codeberg" {
+		t.Errorf("SourceType = %q, want recon:codeberg", f.SourceType)
+	}
+	if f.ProviderName != "openai" {
+		t.Errorf("ProviderName = %q, want openai", f.ProviderName)
+	}
+
+	if gotPath != "/api/v1/repos/search" {
+		t.Errorf("path = %q, want /api/v1/repos/search", gotPath)
+	}
+	if gotQuery == "" {
+		t.Errorf("query param empty")
+	}
+	if gotAuth != "" {
+		t.Errorf("Authorization header should be absent without token, got %q", gotAuth)
+	}
+}
+
+func TestCodebergSource_SweepWithTokenSetsAuthHeader(t *testing.T) {
+	var gotAuth string
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		gotAuth = r.Header.Get("Authorization")
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(`{"ok":true,"data":[]}`))
+	}))
+	defer srv.Close()
+
+	s := &CodebergSource{
+		Token:    "s3cret",
+		BaseURL:  srv.URL,
+		Registry: newCodebergTestRegistry(),
+		Limiters: recon.NewLimiterRegistry(),
+	}
+	out := make(chan recon.Finding, 1)
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	if err := s.Sweep(ctx, "", out); err != nil {
+		t.Fatalf("Sweep: %v", err)
+	}
+
+	if !strings.HasPrefix(gotAuth, "token ") || !strings.Contains(gotAuth, "s3cret") {
+		t.Errorf("Authorization header = %q, want \"token s3cret\"", gotAuth)
+	}
+}
+
+func TestCodebergSource_SweepContextCancellation(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		select {
+		case <-r.Context().Done():
+		case <-time.After(3 * time.Second):
+		}
+	}))
+	defer srv.Close()
+
+	s := &CodebergSource{
+		BaseURL:  srv.URL,
+		Registry: newCodebergTestRegistry(),
+		Limiters: recon.NewLimiterRegistry(),
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	out := make(chan recon.Finding, 1)
+	err := s.Sweep(ctx, "", out)
+	if err == nil {
+		t.Fatalf("expected error on cancelled context")
+	}
+}