Add issuePrefix/issueCounter to companies and issueNumber/identifier to issues for human-readable issue IDs (e.g. PAP-42). Add runId to activity_log for linking activity to heartbeat runs. Rework DB client to support migration state inspection and interactive pending migration prompts at startup. Add reopen option to issue comments validator. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>