Lo L1C - Automatic Goodtimes (#2896)

* Initial stab at converting Lo Instrument Team auto-good-times into SDC compatible CDF production code.

* goodtimes and unit tests

* reverted DE rates

* added test for better coverage

* increased test coverage

* comment fixes

* Updated bgrates creation to create a single rate and variance per species for the entire pointing, consistent with the current Ancillary file. Also added logic to handle creation of output files with 0 start and end times when no GoodTimes are detected. Added test case to cover no goodtimes detected and updated other test cases as needed per the other change. Validated output against current ancillary files using flight data for 2026-02-21 through 02-28.

* test coverage

* added print statements for pipeline debug

* potential fix added

* another fix for modifying array

* epoch metadata print statements

* temp fix for epoch meta

* skipping ruff branching temporarily

---------

Co-authored-by: David Gathright <david.gathright@lasp.colorado.edu>

Author: sdhoyt

imap_processing/cdf/config/imap_lo_global_cdf_attrs.yaml

@@ -101,6 +101,18 @@ imap_lo_l1b_instrument-status-summary:
   Logical_source: imap_lo_l1b_instrument-status-summary
   Logical_source_description: IMAP Mission IMAP-Lo Instrument Level-1B Data
 
+imap_lo_l1b_bgrates:
+  <<: *instrument_base
+  Data_type: L1B_goodtimes>Level-1B Background Rates List
+  Logical_source: imap_lo_l1b_bgrates
+  Logical_source_description: IMAP Mission IMAP-Lo Instrument Level-1B Data
+
+imap_lo_l1b_goodtimes:
+  <<: *instrument_base
+  Data_type: L1B_goodtimes>Level-1B Goodtimes List
+  Logical_source: imap_lo_l1b_good-times
+  Logical_source_description: IMAP Mission IMAP-Lo Instrument Level-1B Data
+
 imap_lo_l1c_goodtimes:
   <<: *instrument_base
   Data_type: L1C_goodtimes>Level-1C Goodtimes List