feat: add patch field to MinimalCommitFile

Include the patch/diff content for each file in commit responses.
This allows consumers to see the actual code changes without needing
to make additional API calls.

The patch field is included when include_diff is true (the default).

Author: Timur

pkg/github/minimal_types.go

@@ -75,6 +75,7 @@ type MinimalCommitFile struct {
 	Additions int    `json:"additions,omitempty"`
 	Deletions int    `json:"deletions,omitempty"`
 	Changes   int    `json:"changes,omitempty"`
+	Patch     string `json:"patch,omitempty"`
 }
 
 // MinimalCommit is the trimmed output type for commit objects.
@@ -236,13 +237,14 @@ func convertToMinimalCommit(commit *github.RepositoryCommit, includeDiffs bool)
 		if len(commit.Files) > 0 {
 			minimalCommit.Files = make([]MinimalCommitFile, 0, len(commit.Files))
 			for _, file := range commit.Files {
-				minimalFile := MinimalCommitFile{
-					Filename:  file.GetFilename(),
-					Status:    file.GetStatus(),
-					Additions: file.GetAdditions(),
-					Deletions: file.GetDeletions(),
-					Changes:   file.GetChanges(),
-				}
+			minimalFile := MinimalCommitFile{
+				Filename:  file.GetFilename(),
+				Status:    file.GetStatus(),
+				Additions: file.GetAdditions(),
+				Deletions: file.GetDeletions(),
+				Changes:   file.GetChanges(),
+				Patch:     file.GetPatch(),
+			}
 				minimalCommit.Files = append(minimalCommit.Files, minimalFile)
 			}
 		}