chore: add CLAUDE.md with Hacken bug bounty PR guidelines

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: rootulp

CLAUDE.md

@@ -0,0 +1,5 @@
+# CLAUDE.md
+
+## Security PRs
+
+- For PRs that resolve Hacken bug bounty reports, do not include details about the bug in the PR description. Instead, link to a Linear issue that contains more details on the bug and the link to the Hacken bug bounty report.