- Add generateHashID function with SHA256-based IDs - Update CreateIssue and CreateIssues to use hash IDs - Add collision detection with nonce retry logic - Add comprehensive tests for hash ID generation - Hash IDs format: prefix-<8 hex chars> (e.g., bd-a3f8e9a2) Amp-Thread-ID: https://ampcode.com/threads/T-48f75379-427f-4d72-bbc2-42bad0d0d62d Co-authored-by: Amp <amp@ampcode.com>