⚡ Optimize secret-digger-copilot: remove unused tools, condense prompt, add emergency exit rule (#1661)

* Initial plan

* Optimize secret-digger-copilot: remove unused tools, condense prompt, add emergency exit rule

- Remove github toolsets and edit tool from shared/secret-audit.md frontmatter
- Add Emergency Exit Rule to prevent near-empty response retry loops
- Condense technique examples from 8-bullet to 1-line-with-examples per item (~3KB savings)
- Recompile secret-digger-copilot.lock.yml with gh-aw v0.66.1
- Post-process all lock files

Note: max-turns:4 not added - copilot engine does not support max-turns

Agent-Logs-Url: https://github.com/github/gh-aw-firewall/sessions/5a262b3d-b3ef-4910-9c45-598c3d00ef31

Co-authored-by: lpcox <15877973+lpcox@users.noreply.github.com>

* Update .github/workflows/secret-digger-copilot.lock.yml

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update .github/workflows/secret-digger-copilot.lock.yml

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: lpcox <15877973+lpcox@users.noreply.github.com>
Co-authored-by: Landon Cox <landon.cox@microsoft.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: 3 people