v5.9.15

• update whatsmeow to 20250801 from tulir/whatsmeow@a23b35d
• fixes #378 - auto-select chat with last received message prior to connection time
• fixes #379 - handle received whatsapp caption updates
• add telegram support for editing captions
• add whatsapp support for editing captions
• retain selection on contact list update
• fetch whatsapp contacts from client library instead of cache
• fixes #385 - allow notifications for already notified unread chats
• fixes #384 - prevent notifications for old messages
• fixes #294 - prune cache when syncing all contacts
• fixes #381 - fix make.sh deps support for debian
• fixes #380 - fix make.sh deps support for gentoo
• update doc, adding back alternatives section