- Initialize $isUpgrade=false in Install.php action() to prevent undefined variable
- Assign $this->lockedDatabase in Upgrade.php before calling parent::action()
- Remove stack trace exposure from buildErrorDetails() in Http Install action
- Suppress raw exception messages for 500+ errors in Error handler
- Remove sessionSecret from progress details to prevent credential leak
- Hash name/email in analytics payload to avoid sending raw PII
- Validate and default dbService in compose.phtml to prevent invalid output
- Fix host normalization in progress.js redirect URL builder
- Release global lock on early return for existing installation conflict
- Consolidate duplicate database host/port assignment blocks
- Add @runInSeparateProcess to testRouteRegistration to prevent global state leak
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>