FnSetExtractorPlugin should not automatically disassemble all files in the project

[sei-eschwartz]

Describe the bug
https://sourcegraph.com/github.com/CERTCC/kaiju/-/blob/src/main/java/kaiju/tools/fse/FnSetExtractor.java?L78

To Reproduce

1. Have files in project.
2. Configure FnSetExtractorPlugin

Here's some logging of a disassembly I didn't initiate or expect:

2023-12-11 12:00:06 WARN  (GhidraPluginsConfiguration) Unable to find plugin package 'CERT Kaiju' while restoring plugins from xml  
2023-12-11 12:00:08 INFO  (PackedDatabaseCache) Packed database cache: /tmp/ed-Ghidra/packed-db-cache  
2023-12-11 12:00:08 DEBUG (PackedDatabaseCache) Using cached packed database: /home/ed/ghidra/ghidra_10.4_PUBLIC/Ghidra/Features/Base/data/typeinfo/generic/generic_clib_64.gdt  
2023-12-11 12:00:10 ERROR (ObjectPropertyMapDB) Object property class not found: kaiju.hashing.FnHashSaveable  
2023-12-11 12:01:01 INFO  (ExtensionTableProvider) Extensions Changed!: Please restart Ghidra for extension changes to take effect.  
2023-12-11 12:01:06 DEBUG (DefaultProjectData) Closing ProjectData: /home/ed/ghidra_project.rep  
2023-12-11 12:01:06 DEBUG (DefaultProjectData) Disposing ProjectData: /home/ed/ghidra_project.rep  
2023-12-11 12:01:08 INFO  (LoggingInitialization) Using log config file: jar:file:/home/ed/ghidra/ghidra_10.4_PUBLIC/Ghidra/Framework/Generic/lib/Generic.jar!/generic.log4j.xml  
2023-12-11 12:01:08 INFO  (LoggingInitialization) Using log file: /home/ed/.ghidra/.ghidra_10.4_PUBLIC/application.log  
2023-12-11 12:01:08 INFO  (Preferences) Loading user preferences: /home/ed/.ghidra/.ghidra_10.4_PUBLIC/preferences  
2023-12-11 12:01:08 INFO  (Preferences) Loading previous preferences: /home/ed/.ghidra/.ghidra_10.3.2_PUBLIC/preferences  
2023-12-11 12:01:08 INFO  (ClassSearcher) Searching for classes...  
2023-12-11 12:01:10 INFO  (ClassSearcher) Class search complete (1166 ms)  
2023-12-11 12:01:10 INFO  (SSLContextInitializer) Initializing SSL Context  
2023-12-11 12:01:10 INFO  (SecureRandomFactory) Initializing Random Number Generator...  
2023-12-11 12:01:10 INFO  (SecureRandomFactory) Random Number Generator initialization complete: NativePRNGNonBlocking  
2023-12-11 12:01:10 INFO  (ApplicationTrustManagerFactory) Trust manager disabled, cacerts have not been set  
2023-12-11 12:01:10 INFO  (GhidraRun) User ed started Ghidra.  
2023-12-11 12:01:11 DEBUG (RecoverySnapshotMgrPlugin) Recovery snapshot timer set to 5 minute(s)  
2023-12-11 12:01:11 INFO  (DefaultProject) Opening project: /home/ed/ghidra_project  
2023-12-11 12:01:31 INFO  (PackedDatabaseCache) Packed database cache: /tmp/ed-Ghidra/packed-db-cache  
2023-12-11 12:01:31 DEBUG (PackedDatabaseCache) Using cached packed database: /home/ed/ghidra/ghidra_10.4_PUBLIC/Ghidra/Features/Base/data/typeinfo/generic/generic_clib_64.gdt  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Upgrading Default Settings...  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Upgrading Instance Settings...  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Fixing Properties...  
2023-12-11 12:01:39 INFO  (ProgramDB) Updating language version for Program 01a67ebd5435a5e0f0cad1faf893b3a1: x86/little/64/default (Version 2.14  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Updating language...  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Preparing for Re-Disassembly...  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Clearing Old Instructions...  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Performing Re-Disassembly...  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Updating Datatype Sizes...  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Upgrading Default Settings...  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Upgrading Instance Settings...  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Fixing Properties...  
2023-12-11 12:01:39 INFO  (ProgramDB) Updating language version for Program 8D1F0: x86/little/64/default (Version 2.14  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Updating language...  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Preparing for Re-Disassembly...  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Clearing Old Instructions...  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Performing Re-Disassembly...  
2023-12-11 12:01:39 INFO  (ConsoleTaskMonitor) Updating Datatype Sizes...  
2023-12-11 12:01:40 INFO  (ConsoleTaskMonitor) Upgrading Symbol Table...  
2023-12-11 12:01:45 INFO  (ConsoleTaskMonitor) Upgrading Default Settings...  
2023-12-11 12:01:45 INFO  (ConsoleTaskMonitor) Upgrading Instance Settings...  
2023-12-11 12:01:45 INFO  (ConsoleTaskMonitor) Fixing Properties...  
2023-12-11 12:01:45 INFO  (ProgramDB) Updating language version for Program BattleForge.exe: x86/little/32/default (Version 2.14  
2023-12-11 12:01:45 INFO  (ConsoleTaskMonitor) Updating language...  
2023-12-11 12:01:45 INFO  (ConsoleTaskMonitor) Preparing for Re-Disassembly...  
2023-12-11 12:01:48 INFO  (ConsoleTaskMonitor) Clearing Old Instructions...  
2023-12-11 12:01:48 INFO  (ConsoleTaskMonitor) Performing Re-Disassembly...  
2023-12-11 12:01:48 INFO  (ConsoleTaskMonitor) Disassembled  1 K  
2023-12-11 12:01:48 INFO  (ConsoleTaskMonitor) Disassembled  2 K  
2023-12-11 12:01:48 INFO  (ConsoleTaskMonitor) Disassembled  3 K  
2023-12-11 12:01:48 INFO  (ConsoleTaskMonitor) Disassembled  4 K  
2023-12-11 12:01:48 INFO  (ConsoleTaskMonitor) Disassembled  5 K  
2023-12-11 12:01:48 INFO  (ConsoleTaskMonitor) Disassembled  6 K  
2023-12-11 12:01:48 INFO  (ConsoleTaskMonitor) Disassembled  7 K  
2023-12-11 12:01:48 INFO  (ConsoleTaskMonitor) Disassembled  8 K  
2023-12-11 12:01:48 INFO  (ConsoleTaskMonitor) Disassembled  9 K  
2023-12-11 12:01:48 INFO  (ConsoleTaskMonitor) Disassembled  10 K  
2023-12-11 12:01:48 INFO  (ConsoleTaskMonitor) Disassembled  11 K  
2023-12-11 12:01:48 INFO  (ConsoleTaskMonitor) Disassembled  12 K  
2023-12-11 12:01:49 INFO  (ConsoleTaskMonitor) Disassembled  13 K  
2023-12-11 12:01:49 INFO  (ConsoleTaskMonitor) Disassembled  14 K  
2023-12-11 12:01:49 INFO  (ConsoleTaskMonitor) Disassembled  15 K  
2023-12-11 12:01:49 INFO  (ConsoleTaskMonitor) Disassembled  16 K  
2023-12-11 12:01:49 INFO  (ConsoleTaskMonitor) Disassembled  17 K  
2023-12-11 12:01:49 INFO  (ConsoleTaskMonitor) Disassembled  18 K