refactor: remove legacy webapp + add missing tests + housekeeping
Phase A: Close fixed issues (#7, #8, #9), add server/ user/ to
.gitignore, increase extractor timeout to 30 min.
Phase B: Add 10 new tests — access request lifecycle (4), CLI admin
commands (5), sync subprocess trigger (1). 578 tests passing.
Phase C: Delete entire webapp/ directory (24,800 lines) — legacy Flask
app fully replaced by FastAPI app/. Fix auth providers to use
app.instance_config instead of webapp.config. Update CLAUDE.md.
Delete 6 webapp-only test files. Fix Jira service config imports.
4d1acd014a