New Features

WIP files will now indicate the group & index of the most similar file for PHash conflicts
Added file_name, file_stem, and file_extension as testable properties
Added hopper defined constants
- All source_* formatting fields & testable properties are now deprecated. See the relevant wiki article for rationale
Added configuration for logging verbosity

Behavior Changes

Group merging will now be done by a link-then-drop instead of one rename operation to keep rollback robust and simple
Log indicating how many files are being ingested now correctly counts files that are being dropped, as they are technically "ingested" (into /dev/null)

In perceptual hashing
- Size limit (32MiB) is now applied consistently and clear errors are added for when exceeded.
- Collisions resolved by the combine action will no longer drop the new file
Data integrity issues encountered whilst scanning groups designated for merging will now correctly trigger rollbacks
Fixed a rare heap corruption that occurs when generating thumbnails for multiple formats
For ingested files, file_* properties at the hopper level will now correctly binds to their path instead their parent directory