i dont like commits

internal/scraper/github.go

@@ -28,12 +28,12 @@ func (s *GitHubScraper) Scrape(ctx context.Context, source *Source) ([]*Document
 
 	repoURL, repoName, err := s.resolveRepo(source)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("resolve github repository: %w", err)
 	}
 
 	tmpDir, err := os.MkdirTemp("", "devour-github-*")
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("create temporary clone directory: %w", err)
 	}
 	defer os.RemoveAll(tmpDir)
 
@@ -81,14 +81,14 @@ func (s *GitHubScraper) Scrape(ctx context.Context, source *Source) ([]*Document
 	local := NewLocalScraper(s.config)
 	docs, err := local.Scrape(ctx, localSource)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("scrape repository docs: %w", err)
 	}
 	if len(docs) == 0 && len(source.Include) == 0 {
 		// Sparse patterns did not match this repository layout; retry full checkout.
 		_ = exec.CommandContext(ctx, "git", "-C", tmpDir, "sparse-checkout", "disable").Run()
 		docs, err = local.Scrape(ctx, localSource)
 		if err != nil {
-			return nil, err
+			return nil, fmt.Errorf("scrape repository docs after sparse fallback: %w", err)
 		}
 	}
 
@@ -129,7 +129,7 @@ func (s *GitHubScraper) DetectChanges(ctx context.Context, source *Source, lastH
 	}
 	_, repoName, err := s.resolveRepo(source)
 	if err != nil {
-		return false, "", err
+		return false, "", fmt.Errorf("resolve github repository: %w", err)
 	}
 
 	remote := "https://github.com/" + strings.TrimSuffix(repoName, ".git") + ".git"
@@ -141,7 +141,7 @@ func (s *GitHubScraper) DetectChanges(ctx context.Context, source *Source, lastH
 	cmd := exec.CommandContext(ctx, "git", "ls-remote", remote, branch)
 	output, err := cmd.Output()
 	if err != nil {
-		return false, "", err
+		return false, "", fmt.Errorf("run git ls-remote for %s (%s): %w", remote, branch, err)
 	}
 	line := strings.TrimSpace(string(output))
 	if line == "" {
@@ -169,7 +169,7 @@ func (s *GitHubScraper) resolveRepo(source *Source) (repoURL string, repoName st
 
 	u, err := url.Parse(raw)
 	if err != nil {
-		return "", "", err
+		return "", "", fmt.Errorf("parse github url %q: %w", raw, err)
 	}
 	if !strings.Contains(strings.ToLower(u.Host), "github.com") {
 		return "", "", fmt.Errorf("not a github url: %s", raw)