What should be the default `composite_release_id`?

The CRID conventions for NISAR products are documented here: https://wiki.jpl.nasa.gov/display/NISARSDS/CRID+release+notification+process

The CRID convention for post-launch releases (after R4.0.8) changed recently:

• EMMmmp
  • Environment
    • A = ADT
    • D = Development
    • T = Test
    • P = Prod
    • S = Science Ondemand
    • E or Q = Engineering or Quick-turnaround (TBD)
  • Major has 2 numerical digits
  • minor has 2 numerical digits
  • patch has 1 numerical digit

Each of the NISAR SAS runconfigs takes a composite_release_id as an optional input parameter, defaulting to "A10000".

• RSLC
  https://github.com/isce-framework/isce3/blob/9df1acfcc42c2c5650e87e40daa90ce8729f4f23/share/nisar/defaults/focus.yaml#L83
• GSLC/GCOV
  https://github.com/isce-framework/isce3/blob/9df1acfcc42c2c5650e87e40daa90ce8729f4f23/python/packages/nisar/products/writers/BaseWriterSingleInput.py#L689-L692
• InSAR
  https://github.com/isce-framework/isce3/blob/9df1acfcc42c2c5650e87e40daa90ce8729f4f23/python/packages/nisar/products/insar/InSAR_base_writer.py#L953-L954

With the new CRID convention, this default value represents "ADT, major version 10". It doesn't seem like a good default for custom NISAR processing workflows.

Should we choose a different default CRID value? Perhaps one that can be easily recognized as a custom (invalid) CRID, like "Z00000"?

Review the CRID convention linked in the issue and compare the default values in share/nisar/defaults/focus.yaml, python/packages/nisar/products/writers/BaseWriterSingleInput.py, and python/packages/nisar/products/insar/InSAR_base_writer.py. Confirm the intended default with project maintainers, then ensure the chosen value is applied consistently at all three locations.