[923] move processing tracker into a lib

Squashed commit of the following:

commit 6f1670f5d25d3e537a0df02f141fa61033b2167b
Merge: 4a10e51d f80fe400
Author: Don Shea <don.shea@nasa.gov>
Date:   Wed Sep 10 17:21:17 2025 +0000

    Merge branch 'develop' into 923-processing-tracker

commit 4a10e51d
Merge: bcc35fd8 b23effc4
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Fri Aug 29 16:24:33 2025 +0000

    Merge branch 'develop' into 923-processing-tracker

commit bcc35fd8
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Wed Jul 30 17:56:13 2025 +0000

    [923] Improved the readability of getLogString()

commit f153c590
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Wed Jul 30 17:53:12 2025 +0000

    [923] Removed currScan parameter from getLogString

commit ff14c262
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Wed Jul 30 17:51:17 2025 +0000

    [923] Removed currLine parameter from shouldLogLine()

commit 71bf7ecb
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Wed Jul 30 17:39:04 2025 +0000

    [923] Added percentComplete to the default constructor. Updated the doxygen comment on the default constructor

commit e0310562
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Wed Jul 30 17:35:17 2025 +0000

    [923] Standardized terminology on referencing scans instead of lines

commit b8b6372b
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Wed Jul 30 17:24:36 2025 +0000

    [923] Added delta to default constructor, Added an error check in shouldLogLine protecting against divide by zero and incomplete initialization errors

commit 6da5151f
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Wed Jul 30 16:52:50 2025 +0000

    [923] Changed the signature of setCurrScan to take in a size_t and updated logic to follow. Corrected a typo in the exception thrown in setCurrScan. Updated Doxygen.

commit f1c16f91
Merge: 2ef5522e c5d3f8c3
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Wed Jul 30 16:45:41 2025 +0000

    Merge branch 'develop' into 923-processing-tracker

commit 2ef5522e
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Wed Jul 23 15:22:19 2025 +0000

    [923] Corrected teh if statement in the nonnull constructor

commit f42d1d64
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Wed Jul 23 14:52:53 2025 +0000

    [923] Updated variable name interval to loggingRate

commit e433c45f
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Tue Jul 22 19:16:45 2025 +0000

    [923] Added a getter for percent complete

commit eff7092c
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Thu Jul 17 20:45:44 2025 +0000

    [923] Added a Doxygen comment to the default constructor

commit 71694088
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Thu Jul 17 20:44:24 2025 +0000

    [923] Updated setInterval to agree with the constructor that takes in an interval

commit c1bcdcf2
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Thu Jul 17 20:42:54 2025 +0000

    [923] Corrected a logical AND to a logical OR

commit cc2922d9
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Thu Jul 17 20:42:21 2025 +0000

    [923] Clamped startingLine and initial currScan to 0 in a more idiomatic way

commit 99315a19
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Thu Jul 17 20:35:05 2025 +0000

    [923] Updated setInterval for correctness and error checking

commit d628bcc2
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Thu Jul 17 20:32:59 2025 +0000

    [923] Constified getters

commit 8afb17da
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Thu Jul 17 17:34:51 2025 +0000

    [923] Added error checking to setCurrScan

commit ab50840e
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Thu Jul 17 17:14:30 2025 +0000

    [923] Added interval getter/setter, currScan setter/getter

commit 24dd12f8
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Thu Jul 17 16:46:29 2025 +0000

    [923] Changed single-inclusion guard to something more general

commit dab32e97
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Thu Jul 17 16:38:59 2025 +0000

    [923] Moved ProcessingTracker to oel_util under new subdirectory libprocessingstats