Large uploads: raise php.ini max_input_time to avoid timeouts

[lucifer4330k]

php.ini sets max_input_time = 60, which can abort large multipart/form-data uploads while PHP is still reading POST data. We recently raised upload_max_filesize and post_max_size to 5G; max_input_time should be raised accordingly.

Proposed change

• Set max_input_time = 3600 (or -1 for unlimited) in docker/config/php.ini.

Acceptance criteria

• Uploading multi-GB datasets does not time out while parsing request data.
• No regressions for normal requests.

Reference

• docker/config/php.ini currently: max_input_time = 60.