v1.16.5

Changelog

• 171af02 fix(channels): apply defaults in New() for zero-initialized configs
• f026cd0 fix(channels): merge bool defaults for WhatsApp and channel instances
• 3246ce8 fix(channels): reinitialize messages channel on reconnect
• 585bfa9 fix(channels): use DefaultConfig for runtime-created instances
• 6d4eb4a fix(telegram): overhaul channel integration — connection, access control, and hot-reload
• 6b21359 fix(telegram): resolve boot token, default bools, and listener race