Issue #3581834: Add support for custom Tika configuration file path (--config flag)
Adds support for passing a custom Tika configuration file via the --config flag. This allows administrators to customize Tika behavior (e.g., disabling OCR) without modifying the Tika jar itself.
Changes:
- New optional tika_config_path setting in Tika extractor configuration
- Form field with validation for the config file path
- --config= appended to the Tika command when set
- update_8005 to add the config key to existing sites on drush updb
