fix: handle missing GH_ORG_TOKEN gracefully in check-codeowner

Author: mvvmm

.github/actions/check-codeowner/action.yml

@@ -4,7 +4,7 @@ description: "Check whether the event actor is listed in CODEOWNERS, including t
 inputs:
   GH_ORG_TOKEN:
     description: "Token with read:org scope for resolving team membership"
-    required: true
+    required: false
 
 outputs:
   is-codeowner:

.github/actions/check-codeowner/index.js

@@ -93,7 +93,12 @@ async function isCodeowner(octokit: Octokit, actor: string): Promise<boolean> {
 
 (async function () {
 	try {
-		const token = core.getInput("GH_ORG_TOKEN", { required: true });
+		const token = core.getInput("GH_ORG_TOKEN");
+		if (!token) {
+			core.warning("GH_ORG_TOKEN not set — skipping CODEOWNERS check");
+			core.setOutput("is-codeowner", "false");
+			return;
+		}
 		const octokit = github.getOctokit(token);
 
 		const actor = getActor();