ci: Add GHA automation for daily issue and PR insights (#32449)
1. On each run, the script reads the last-run timestamp from hashy (or
computes one from the `HOURS_LOOKBACK` input for manual runs)
2. Fetches all issues and PRs created since that timestamp via the
GitHub API
3. Filters for "no response" items: issues with 0 comments, PRs with no
comments and no reviews
4. Posts a Slack message with counts and linked lists of no-response
items
5. Saves the current timestamp to hashy for the next run
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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: bartlomieju <13602871+bartlomieju@users.noreply.github.com>
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
