feat(identity): created-content footer

internal/identity/footer.go

@@ -0,0 +1,14 @@
+package identity
+
+import "strings"
+
+func ApplyFooter(body, caller string) string {
+	if caller == "" {
+		return body
+	}
+	footer := "\n\n---\n_Created via git-mcp on behalf of @" + caller + "_"
+	if strings.HasSuffix(body, footer) {
+		return body
+	}
+	return body + footer
+}