Fixed some broken file paths
Fixed a couple of bugs with closed groups
Fixed a few migration issues
Fixed a bug with the ProfilePictureView in open groups (was including the open parenthesis in the initials)
Migrated the Id Blinding changes to work with GRDB
Migrated the call logic to work with GRDB
Updated the code to work the with hard fork changes
Removed an unused endpoint
Moved 'Dependencies' into the Utilities folder (also out from being nested within 'OpenGroupAPI' since it can be broader than that)
Finished adding unit tests for the OpenGroupAPI
Updated the direct file upload/download to use the non-base64 approaches as well
Updated the attachment 'serverId' value to be a string instead of a UInt64 (future-proofing)
Updated the OnionRequest V4 response handling to avoid converting the "response body" part to a string and processing that, instead just slice the byte array (ie. stopped it from being broken from multiple conversions)
Removed the base64-based file upload/download endpoints (no use including them when they are inefficient and we don't want to use them)
Added a couple more dependencies for unit testing injection
Updated the MessageSender to set the sender of the message to the appropriate blinded/unblinded key
Updated the OpenGroup Message to handle verification of both blinded and unblinded messages
Updated the MessageSender to use dependency injection for it's sendToOpenGroupDestination method
Updated the JSONDecoder to support getting dependencies (for signature verification)
Fixed tests broken by updating the signing logic