config: remove documentation-only label filter to enable all GitHub issues

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jiunbae

oac.config.ts

@@ -18,7 +18,7 @@ export default defineConfig({
       lint: false,
       testGap: false,
     },
-    issueLabels: ["documentation"],
+    issueLabels: [],
   },
   analyze: {
     autoAnalyze: false,