Update wiki for PRs #136-#188
- System Architecture: update file storage paths (DATA_DIR/files/<chat_id>/),
memory location (DATA_DIR/memory/MEMORY.md), per-user history directories,
file cleanup background task, save prompt before shutdown, health monitor
failure tracking, GitHub notification routing, SSRF protection, response
size cap, error detail redaction, cooldown pruning
- Protected Installation: workspace/ to home/ rename, add history/memory/files
per-user subdirectories to directory layout, note runtime data separation
- External Services: add allow_path_suffix field, SSRF protection, 10MB
response cap
- Multi-User Setup: update history and file isolation to use DATA_DIR paths
- Workspaces: workspace/ to home/ in home workspace description
- Testing: update test count (827 to 1173) and file count (21 to 25), add
pool, prompt_utils, telegram_utils, phase2_isolation, user_config,
workspace_config test entries
- Troubleshooting: add health monitor failure notification section
Update Testing page: 827 tests, add review and triage modules
Add Testing wiki page and security model section