Apache Commons Text Vulnerability Fix

Updated apache-commons-text references to v1.10.0 to eliminate vulnerability found in v1.9 and earlier.

Read Accessibility Flag from Config + Small Code improvements

1. Add support to read the Accessibility flag correctly from ApacheFOP configuration as noted in the documentation; a bug exists where the value is not loaded so we manually support this now in a way that is fully compliant with the documentation. The original support from Azure Function configuration (environment variable) is still supported also.
2. Several small code improvements for consistency
3. Additional debugging log added to better know if rendering process was completed (e.g. logs SUCCESS along with Pdf Byte Size).