EDEN 100.9.15 — Test report

- PHP syntax: 75/75 PHP files passed `php -l`.
- ZIP integrity: `unzip -t` passed.
- ZIP layout: `index.php` is at root; no enclosing project directory.
- Update manifest: version 100.9.15, 303 update paths, 0 missing paths, 0 duplicate entries.
- Uploader: retry columns are selected, created and migrated by runtime schema reconciliation. Failed notices use progressive delays (30 seconds, 2 minutes, 10 minutes, 30 minutes) and retry is stopped after five failures; permanent Telegram destination errors stop immediately.
- Uploader logging: file_id no longer occupies the source-file context key; the actual PHP file and line are captured.
- Challenge diagnostics: caught creation failures log stage, exception class/code/message, source file, line and stack trace.

Limitations: production MySQL migrations, Telegram sends, and live challenge creation were not executed in this workspace. The actual root cause of the reported challenge failure is not inferable from the generic owner notification alone; this release adds precise exception location and trace to the next report.
